Safety Center

Hbarter is a peer-to-peer platform for trading NFTs on the Hedera network. You can list NFTs you own, browse listings, and receive offers. An offer can be NFTs or — when that option is turned on — HBAR, and some listings let a buyer offer either one as alternatives for the owner to choose from. A completed swap settles one type only — NFTs or HBAR, never both together. When you accept an offer, both sides sign a Secure Swap in their own wallet, and Hbarter completes the trade once everyone has signed.

You can also find collectors in Collectors — Hbarter members and other Hedera wallets holding verified collections — and send a Collector Offer straight to an Hbarter member's profile if they accept offers: NFTs for NFTs, without a listing. An accepted Collector Offer uses the same Secure Swap.

Hbarter is not a centralized exchange, broker, escrow provider, wallet, custodian, insurer, or guarantor. It coordinates the listing, offer, and swap workflow — your wallet authorizes the transfer from your account.

Hbarter operates on Hedera Mainnet.

No. Hbarter does not take custody of your NFTs or HBAR into an Hbarter-controlled account, and it does not hold your wallet keys. Your assets stay in your Hedera account unless and until a transfer you authorized is confirmed on the network.

In a swap, the transfer from your account requires your own signature on the exact swap. Hbarter's own server keys also sign, but only to create and submit the swap, pay the network fee, and cancel a Secure Swap that has not completed; they never authorize moving your assets on your behalf.

A listing advertises NFTs you own and what you'd like in return. Others can send you offers. When HBAR offers are turned on, an offer can be NFTs or HBAR, and some listings let a buyer propose either one as alternatives for the owner to pick from. The listing owner reviews the offers and accepts one deal, and a completed swap settles one type only — NFTs or HBAR, never both together. Creating a listing or making an offer does not transfer anything on-chain and does not move your assets.

While an offer is being coordinated into a swap, Hbarter applies an application-level lock so the same NFTs are not committed to two swaps at once. This lock is internal to Hbarter — it organizes the workflow and is not an on-chain freeze. Ownership is re-checked against the Hedera network before the swap transaction is built.

A Choice Swap lets a listing show a pool of NFTs, and the other side selects which ones the deal is for. Only the NFTs selected in the accepted deal are included in the swap.

Unselected NFTs stay in the owner's wallet. They are not locked, transferred, or included in the completed trade — only the selected NFTs move, and only if the swap succeeds.

A Choice NFT Offer works the other way round from a Choice Swap. Where it is available, the person making the offer puts forward a pool of their NFTs and sets how many of them the trade will include, and the listing owner chooses which ones they want.

Only the NFTs the listing owner chose are included in the swap. The rest of the pool stays in the offerer's wallet and is not transferred. A Choice NFT Offer is NFTs for NFTs, and it completes through a Secure Swap like any other accepted offer.

When HBAR offers are turned on, someone can offer HBAR instead of NFTs. An HBAR offer uses the same safe wallet-signing flow as an NFT trade, and if it succeeds it moves the agreed assets. Before signing, check:

• The exact HBAR amount in the offer.
• The connected wallet account.
• The NFT being traded — by token ID and serial number (on the swap page, View swap assets shows both).
• Any fees or warnings your wallet shows.
• The network (this should be Hedera Mainnet today).

HBAR offers are only available when that option is turned on, and not every listing will have them.

Accepting an offer starts a guided, fail-closed sequence rather than an instant transfer:

• Hbarter creates a Secure Swap for the accepted offer. Accepting does not move anything yet.
• You sign your part in your own wallet and the other person signs theirs, within a safe signing window. With a Secure Swap, that window is long enough that you don't need to be online at the same time.
• Before completing, Hbarter re-checks ownership, balance, and token association where they apply.
• The swap completes only after both sides have signed: Hedera then carries it out as one all-or-nothing transaction that moves the agreed assets, along with the platform fee shown to you before you signed. Hbarter marks the swap completed only after Hedera confirms it succeeded.
• If the swap expires, is cancelled, or fails, nothing moves — every asset stays where it was.

It depends on the stage:

• A listing can be cancelled while it is active, before a swap is being submitted.
• Before an offer is accepted, the person who made it can withdraw it, and the person who received it — the listing owner, or the collector for a Collector Offer — can decline it.
• Either participant can cancel a Secure Swap until both sides have signed. You can't take back only your own signature — cancelling cancels the whole swap for both of you.
• Once both sides have signed, the swap can no longer be cancelled: Hedera carries it out, and it either completes in full or fails with nothing moving.
• Once a swap is confirmed on Hedera, it is final — a confirmed transfer cannot be undone.

If a Secure Swap is cancelled or its signing window ends, nothing moves, no platform fee is charged, and that offer is closed. To trade again, a new offer has to be made and accepted.

Self-custodial means you keep control of your own wallet keys. Hbarter coordinates the listing, offer, and swap workflow, but the transfer of your NFTs only happens after you approve and sign the transaction in your own wallet.

Each transfer of your assets out of your account requires your approval. Always review the trade on Hbarter and the request your wallet shows before approving it. Hbarter coordinates the workflow, but it does not review the assets on your behalf.

A Collector Offer is an offer sent straight to a collector's profile instead of to a listing. The sender picks NFTs the collector holds and NFTs of their own — up to 5 on each side — and reviews the deal before sending it. Collector Offers are NFTs for NFTs only; they can't include HBAR or tokens. Any platform fee is shown on the swap page before you sign.

• Sending or receiving a Collector Offer doesn't move any NFT — everything stays in its owner's wallet. While your offer is open, the NFTs you offered can't be put into a new Marketplace listing; the NFTs you asked for are not held back in any way.
• If you receive one, it appears in Collector Offers under My Offers on your profile, where you can accept or decline it. The sender can withdraw it while it is open.
• Accepting starts a Secure Swap that you both still sign, so nothing moves until Hedera completes it.
• If an NFT in the offer changes hands before then, the offer can't go ahead.
• One sender can have at most 3 open Collector Offers to the same collector.

Other Hbarter users can send you offers you didn't ask for. A Collector Offer has no message field, so ignore any username or picture that tells you to go somewhere else. An offer is not a recommendation from Hbarter, and a real Collector Offer never asks you to visit another site, message someone, or share anything. Review it on Hbarter itself, check every NFT by token ID and serial number, and decline anything you don't want.

Collector Discovery is public. It can include Hbarter members and Hedera wallets that hold Hbarter-verified NFT collections, built from public Hedera account holdings — so a wallet can appear there before its owner ever signs in. When you sign in, that same Hedera account becomes an Hbarter member: one Collector profile, now with your profile details. Your card can show your account ID, username and avatar, how many verified NFTs and collections you hold, a few of those NFTs, and when that information was last updated.

Those holdings come from an index Hbarter refreshes periodically to help people find each other. It can be out of date, and it is never used as proof of ownership — every trade re-checks ownership on Hedera.

There is no setting that hides a Collector page from discovery. Your Collector Offer settings in Edit Profile control who can send you Direct Collector Offers — Everyone or Nobody, and from which projects; they do not hide your page. Keep in mind:

• Your profile page can be opened directly by anyone who has its address.
• Your account ID, holdings and transfers are public on the Hedera ledger, where anyone can look them up.
• Turning Collector Offers to Nobody stops new offers; offers already sent to you stay open.

Collector Offers are not private between the two of you. The open Collector Offers a collector has received are shown on their profile's Offers tab, which anyone can view. Each one shows:

• The sender's account ID, username and avatar.
• The NFTs on both sides of the offer.
• Its status and the date it was sent.

There is no setting that hides that public list. Choosing “Nobody” in your Collector Offer settings stops new offers, but it does not hide offers you have already received.

Before you send a Collector Offer, assume other people can see who sent it and what it proposes.

In Edit Profile, under Collector Offers, you can choose:

• Who can send me Collector Offers — Everyone (the default) or Nobody.
• Accepted projects — any verified project (the default), or only projects you pick, up to 20. This decides which NFTs other collectors can offer you.

These settings only affect new Collector Offers. Changing them never cancels offers already sent, they don't change the terms of your Marketplace listings, and they never change whether you appear in Collectors.

When you're signed in, you can block another account from the options menu on their profile. Once you do:

• Neither of you can send the other new offers — on listings or as Collector Offers — and no new swap can start between you.
• Open offers between you are closed once it's safe to do so. A swap that is already in progress continues normally.
• The other account isn't told about the block; if they try to send you an offer, they get a general message that it can't be sent.

Blocking does not hide anyone. Both profiles, listings and Collectors entries stay public. Your list of blocked accounts is visible only to you, in Edit Profile under Blocked accounts, and you can unblock someone at any time. Offers that were closed by a block don't come back.

Blocking is different from your Collector Offer settings, which only control who can send you new Collector Offers.

Hbarter supports HashPack through its wallet-connection flow so you can connect a Hedera account and approve the transaction required for a swap. The signing request is handled by your wallet; Hbarter receives the resulting signature, not your private key or recovery phrase.

Using HashPack does not imply any exclusive partnership, endorsement, certification, or security guarantee from HashPack.

In a Secure Swap, Hbarter first creates the swap on Hedera for your accepted offer, and your wallet then asks you to approve your part of that swap. Depending on your wallet, that request may identify the swap by its schedule ID rather than list every NFT in it. So do the detailed check on Hbarter first, before you press Review & Sign Swap:

• On the swap page, open View swap assets and check every NFT you send and every NFT you receive. Each NFT's details show its token ID and serial number.
• Check any HBAR or token amount and the fees shown for your side.
• Make sure the deal matches the offer you accepted or sent.

Then, in your wallet, check:

• The connected account is the one in the trade.
• The network (this should be Hedera Mainnet today).
• That the request appeared right after you pressed Review & Sign Swap on the Hbarter site you opened yourself.
• Any fees or warnings your wallet shows.

If your wallet shows something you don't recognize, or a request appears that you didn't start, reject it. Approving a request only adds your signature to that one swap; it can't be reused for a different trade.

Hbarter does not ask for or store your private key or recovery phrase. HashPack states that it is non-custodial and that wallet data is encrypted on the user's device rather than shared with HashPack. You should still protect your device, browser, wallet password, recovery phrase, and private keys.

Never enter your private key or recovery phrase into any website, message, form, or person — including anyone claiming to be Hbarter support. No legitimate request will ever need them.

Nothing is transferred. If you reject the wallet request, no valid signature is recorded for that swap, so it cannot go ahead on that request. If the swap session is still active, it stays in its prior safe state and you can try again while it remains valid.

In a Secure Swap, you can press Review & Sign Swap again while the swap's signing window is still open — Hbarter prepares a fresh request each time. Once the signing window has ended, the swap can no longer be signed.

Hbarter compares the connected wallet account with the account required for the swap and blocks signing with the wrong account where it can detect this in the browser. The server also validates the account and signature, which is the authoritative check.

Client-side detection alone is not a security guarantee, so always confirm the displayed account is the one you intend to use before approving.

Connecting lets Hbarter receive public account information and request approval for a specific transaction. In the current integration, connecting does not grant Hbarter general spending authority over your wallet.

Each transfer from your account still requires the necessary wallet approval for that exact transaction. You can end the connection using the controls provided by your wallet.

Hbarter completes a trade using a single Hedera transfer that contains both directions of the deal — what leaves your account and what comes to you. On Hedera, such a transfer is all-or-nothing: if any part is invalid or a required signature is missing, the whole transfer is not carried out and nothing transfers. If an offer involves HBAR, the same all-or-nothing rule covers the whole deal. When an Hbarter platform fee applies, it is settled inside this same transaction, so it is only ever paid when the swap fully succeeds.

In a Secure Swap, Hbarter creates this transfer on Hedera first, and Hedera carries it out automatically once both sides have approved it. Creating it does not move anything — only a carried-out, successful transfer does.

This applies to the on-chain transfer itself. Hbarter separately finalizes its own listing, offer, and session records after the network confirms the result, and reconciles if a submission outcome is uncertain.

On Hedera, moving an asset out of an account requires that account's authorization. Because a swap can move assets from both accounts in one transaction, each side must sign to authorize their own part — no one can move assets from only one side. In a Secure Swap, each of you adds your own approval to the same swap from your own wallet, and Hedera carries it out only once both approvals are in.

Hbarter's own server keys also sign, but only to create the swap, pay the network fee, and cancel a Secure Swap that has not completed — not to authorize anyone's transfer.

The swap is not completed, and no partial transfer occurs — no assets move from either side. A signature is tied to that specific swap; it cannot be reused on a different one.

In a Secure Swap, the first signature stays attached to that swap while Hedera waits for the second. If the second signature doesn't arrive before the signing window ends, or either side cancels the swap first, Hedera never carries it out and nothing moves.

A Secure Swap has a signing window, shown as a countdown on the swap page. If both sides haven't signed before it ends, Hedera never carries the swap out: nothing moves, no platform fee is charged, and the offer is closed. To trade again, a new offer has to be made and accepted.

If a Secure Swap isn't available for a trade, Hbarter uses an older direct swap instead, where both sides sign one transaction that is only valid for a few minutes. If that one expires, it can be restarted from the swap page, which builds a new transaction that needs new signatures.

A Hedera Mirror Node provides read-only access to network data; it does not take part in consensus. Hbarter reads from the Mirror Node to verify things like current NFT ownership and token status before a swap.

HashScan is a public explorer for viewing Hedera transactions, accounts, and tokens. Hbarter links to HashScan so you can inspect a confirmed transaction. Neither tool replaces reviewing the trade on Hbarter and the request in your wallet before you sign.

Once an NFT transfer has been confirmed on Hedera, Hbarter cannot provide an “undo.” A successfully confirmed transfer reaches network finality, so the only way to move an NFT back would be a new, separately authorized transfer by its current owner.

Always review the assets on Hbarter and the account in your wallet before signing — that review is your main protection, because a confirmed transfer cannot be taken back.

Keep three separate kinds of cost in mind — they are not the same thing:

• Hedera network transaction fee — paid to the network to process a transaction. For the swap transaction itself, in the current Mainnet flow, Hbarter's operator account pays this.
• Token-association network fee — if your account needs to be associated with a token before it can receive it, you approve that separate transaction in your own wallet and pay its Hedera network fee. Hbarter does not pay it for you.
• Collection royalty — a share of a sale set by an NFT collection's creator and assessed by the network. Where it applies, it reduces what the seller receives.
• Collection fallback fee — a fixed HBAR fee some collections charge the account receiving an NFT when the sender receives no payment in return. It applies to NFT-for-NFT trades.
• Hbarter platform fee — Hbarter currently charges a successful-swap platform fee. Each participant pays 2 HBAR (4 HBAR in total per swap) to the Hbarter treasury, and only if the swap succeeds.

The platform fee is settled inside the same all-or-nothing swap transaction, and the exact amount is shown to you before you sign. If the swap fails, expires, or is cancelled, no platform fee is charged.

Each participant pays their own share of the platform fee in HBAR. That applies to every kind of trade — so if you are buying an NFT with an Approved Payment Token, you still need enough HBAR of your own for your share.

This is the current Hbarter platform fee policy. If it changes, the updated fee will be shown before you sign.

A royalty fee is a custom fee a collection creator can configure on a token. For NFTs, Hedera describes the royalty fee as paid by the account receiving the NFT when it is exchanged for fungible value. These rules live in the token's configuration, not in Hbarter.

There is no single universal royalty percentage, and Hedera notes royalty fees are a convenience feature the network cannot enforce if parties structure transfers to avoid them.

On a sale — where a buyer pays HBAR or an Approved Payment Token for an NFT — a royalty comes out of the seller's side. The buyer pays the agreed amount, the network assesses the collection's royalty, and the seller receives the amount paid less that royalty. Where a royalty applies, the completed receipt shows all three figures: the amount paid, the royalty assessed, and the seller's net proceeds.

Hbarter supports only certain royalty configurations. A collection that can still change its fee schedule after both sides agree is not eligible for a sale, because the royalty could be raised before the trade settles. A collection whose live fee terms no longer match what Hbarter recorded when it was verified is blocked, as is a collection carrying more than one royalty. Where a configuration is not supported or cannot be read, the trade does not proceed.

A royalty is set by the collection and assessed by the Hedera network. Hbarter neither sets it nor receives it.

A fallback fee is a fixed fee attached to an NFT royalty configuration. Hedera can assess it to the new NFT owner when the NFT sender receives no fungible value in the transfer. In a pure NFT-for-NFT swap, no HBAR or fungible token is exchanged as payment for either NFT, so a configured fallback fee can be triggered.

This fee is set by the NFT collection, not by Hbarter — Hbarter never receives it. When it applies, the Hedera network charges it to whoever receives that NFT, separately from the Hbarter platform fee and the Hedera network fee.

Where a fallback fee is supported for an NFT-for-NFT trade, the participant receiving that NFT owes it in HBAR, and the amount is shown before signing. Not every collection has one.

• It applies to NFT-for-NFT trades only. On a sale the seller receives payment, so a fallback fee does not arise.
• Only HBAR-denominated fallback fees are supported. A fallback fee denominated in a token is not supported and blocks the trade.
• Only certain configurations are supported. A collection that can still change its fee schedule, or whose fee terms cannot be read or verified, is blocked.

The fee is set by the collection and assessed by the Hedera network. Hbarter never receives it and never adds a transfer of its own for it.

Hbarter is fail-closed: if a safety check cannot pass, the swap does not proceed. Real reasons a swap can be blocked include:

• A collection has a royalty fallback fee that the swap cannot satisfy.
• Custom-fee data cannot be read or verified at that moment.
• The project is not active in Hbarter's registry.
• Ownership changed and a party no longer holds the NFT.
• A receiver's account is not associated with the token.
• The swap session is in an invalid or stale state.

Fee rules are configured on the Hedera token or NFT collection, not created by Hbarter. Depending on the token configuration and the type of transfer, those rules may also apply when the asset is transferred or traded through other compatible wallets, marketplaces, or tools.

Exact outcomes depend on how each transfer is structured, so the same fee will not necessarily apply identically everywhere.

A network transaction fee is what Hedera charges to process a transaction. It is separate from Hbarter platform fees, collection royalties, fallback fees, and any separate token-association transaction fee when an association is required.

In the current Mainnet implementation, Hbarter's operator account pays the swap transaction's network fee. Network fees can vary, and this operator-paid arrangement may change; a materially different fee arrangement must be disclosed before it applies.

Before approving any wallet request, take a moment to check:

• You intentionally opened the correct Hbarter website and verified the exact domain instead of trusting a link from a message.
• The connected account is the one you intend to use.
• Every NFT you are sending — by token ID and serial number, not just the image or name. On the swap page, View swap assets shows both for each NFT. In a Choice Swap or Choice NFT Offer, check the specific NFTs selected for the deal.
• Every NFT you expect to receive — also by token ID and serial number.
• The exact HBAR amount, if the offer involves HBAR.
• That the deal matches what you accepted or sent on Hbarter.
• The account and network your wallet shows.
• Any fees or warnings displayed.
• How much of the signing window is left, shown on the swap page.

Your wallet may not list every NFT in a Secure Swap, so check the assets on Hbarter before you press Review & Sign Swap. Do not sign under time pressure, and reject anything you did not expect.

Never share any of these with Hbarter or anyone else:

• Your private key.
• Your seed phrase or recovery phrase.
• Your wallet password.
• One-time security or authentication codes.
• Remote-control access to your device.

Your Hedera account ID and your on-chain activity are not secret — they can be viewed publicly on the ledger. The items above are what must stay private.

A few practical habits go a long way:

• Check the exact website domain before connecting your wallet.
• Do not trust unsolicited direct messages, even if they look official.
• Hbarter support will never ask for your wallet secrets.
• Read each wallet request yourself, independently of any chat or instructions telling you to approve it.
• Avoid clicking links shared by unknown accounts; navigate to the site yourself.

Hbarter's notifications live inside Hbarter. When you're signed in with your wallet connected, the bell at the top of the site shows them, and offers you've received are listed under My Offers on your profile. Where available, you can also turn on Push Notifications for a device from your profile, which send a short alert that opens Hbarter.

• Your wallet does not deliver Hbarter offer notifications. Connecting HashPack lets Hbarter ask you to approve a specific request — it is not a messaging channel.
• A real wallet request from Hbarter only appears right after you press a button on the Hbarter site, such as Review & Sign Swap.
• Treat any message, pop-up or link about an offer that doesn't come from inside Hbarter with suspicion. Open Hbarter yourself and check the offer there.

Stop using the affected site or device and do not approve any new wallet request. A compromised website, browser extension, device, or wallet can show misleading information or request a transaction you did not intend to sign.

• Reject any pending wallet request you do not fully recognize.
• Disconnect the wallet session using your wallet controls.
• Use a trusted, clean device to review your account and recent transactions on HashScan.
• If wallet secrets may have been exposed, follow your wallet provider's official recovery guidance and consider moving assets to a newly secured account.
• Contact Hbarter at hbarter.app@gmail.com with non-secret details about the incident. Never send a private key, recovery phrase, wallet password, or one-time code.

No website, wallet, browser, or device can be guaranteed to be completely secure. Your final protection is to verify each wallet request and reject anything unexpected.

Yes. Depending on how a Hedera token was created, authorized token keys may allow actions such as pausing transfers, freezing an account for that token, updating certain token settings, or wiping tokens from an account. Not every collection has every key, and the available controls depend on that token's configuration.

Hbarter's Verified Project status does not remove or override token-level controls. Before trading, review the token ID and available token information through Hbarter and the linked Hedera explorer.

A Verified Project is a collection that an Hbarter administrator has added to Hbarter's approved registry. Only NFTs from verified projects can be used in listings and offers. Verification means the token was reviewed and enabled for use on Hbarter according to its current process.

Verification is about eligibility on Hbarter — it is not a guarantee of value, authenticity of every related account, or safety.

Being verified on Hbarter does not mean any of the following:

• It does not guarantee value, price, or liquidity.
• It is not investment advice or an endorsement.
• It does not verify the creator's real-world identity or audit any contract.
• It does not guarantee that external links or community accounts are safe.
• It does not protect against a compromised owner account.
• It is not a substitute for checking the token ID and serial number of each NFT.

If a request, listing, or message seems off:

• Stop, and do not approve the wallet request.
• Reject the request in your wallet.
• Do not proceed with the swap.
• Re-check the website domain and the connected account.
• Only continue once you can confirm the details yourself.

Never share your private key, recovery phrase, or password with anyone, including anyone claiming they can help recover or fix your account.

Where payment-token offers are available, a buyer can pay with an Approved Payment Token instead of NFTs or HBAR. Before you sign, check the token itself — not just how it is labelled.

• Check the Hedera token ID. That is what identifies a token. A name, symbol, logo, or social account can be copied by anyone.
• Check the amount together with the token's decimals. The same digits mean very different values at different decimal places.
• Check who is sending and who is receiving, and that the receiving account is the one you intend to use.
• Check whether your account is already associated with the token. If it is not, you will need to approve an association first.
• Remember that the token's issuer may be able to freeze accounts, require KYC, or pause transfers. Those controls stay with the issuer.

A token being approved on Hbarter means it is eligible for use here. It is not an endorsement, a valuation, or a promise that it will keep its value, stay liquid, or remain available.

A Hedera account cannot receive a token it is not associated with. If you are due to receive an NFT from a collection your account has never held, or an Approved Payment Token your account has never held, you may need to associate with it first.

• Association is a separate transaction from the swap. It is never bundled into it.
• You review and approve it in your own wallet — it changes your account, so only you can authorise it.
• You pay the Hedera network fee for that association transaction. Hbarter does not pay it for you.
• It applies to the account that will receive the token. On a sale, that can be the seller receiving the payment token, not only the buyer receiving an NFT.

Associating a token does not transfer anything and does not commit you to a trade. It only allows your account to hold that token.

Before a trade can settle, each side has to be able to complete their part of it. Hbarter checks that when you open the swap, and tells you what is outstanding on your side.

Things you can resolve yourself:

• A token association you still need to approve.
• Not enough HBAR for your share of the platform fee.
• Not enough of the payment token your offer proposed.

When the outstanding item is yours alone, it blocks you and not the other participant. They may be able to sign first and wait for you. Resolving it takes time and may involve a Hedera network fee, and the trade can still expire or be cancelled while you deal with it — nothing is reserved for you in the meantime.

Things that end the attempt:

• An NFT in the trade is no longer held by the account that offered it.
• An account is frozen for the token, or a KYC requirement is not met.
• A collection's fee configuration is not supported, cannot be read, or no longer matches what Hbarter verified.

These cannot be worked around inside Hbarter. The attempt ends and every asset stays where it was.

You only ever see what is outstanding on your own side. Hbarter does not show your balances, or what you still need to do, to the other participant or to the public.

The figures Hbarter shows before you sign — amounts, fees, and any royalty or fallback fee — are review information, based on what could be read at that moment. They help you decide whether to sign. They are not the result.

Once a trade settles, the confirmed Hedera transaction is what actually happened, and the Hbarter receipt reports it. Where a collection royalty applied, the receipt shows the amount paid, the royalty assessed, and the seller's net proceeds.

Just after a successful trade, the network's record of assessed fees can take a short time to become readable. Until then a fee figure may be shown as still being confirmed rather than as a final number. That is the record catching up, not the trade changing.

Keep the transaction ID from your receipt. It is public, safe to share, and lets anyone verify the trade independently on a Hedera explorer.