If a prediction market deposit address changed, stop before sending funds. Reopen the authenticated deposit flow and verify the same account, login method, funding method, asset, blockchain network, memo or tag requirement, and complete destination. A changed address can be legitimate, but an unexplained change must be treated as a security event until the official interface confirms it.

Key Takeaways

Never rely on a saved address, search result, message, clipboard alone, or an earlier screenshot.

Distinguish an account-specific address from a network-specific address, bridge route, payment processor, or different product.

Compare the full destination and required memo or tag on two trusted views before sending.

Use a small test only after every identity and network check passes; a test does not make an unverified destination safe.

If the official flow and your trusted record disagree without explanation, secure the account and contact official support.

If a prediction market deposit address changed, why did it happen?

There is no single deposit model across prediction markets. A platform may assign a stable address to a profile, display a different address for each supported network, route deposits through a processor, or generate a fresh instruction for a specific funding product. An app redesign can also move the same instruction to a new screen without changing the underlying destination.

Polymarket documents one particular model: a profile has a fixed crypto deposit address, while addresses differ between supported networks.［1］ That statement is useful only for that service and flow. Do not assume that every venue keeps an address forever, or that two networks should display the same string.

What changed?	Possible legitimate explanation	Security concern to exclude
Address after switching networks	Each network has its own destination	Wrong network or fake selector
Address after using another login	You opened a different profile	Account takeover or account mismatch
Memo or tag appeared	Asset or processor requires routing data	Phishing instruction or omitted memo
Funding page moved to a partner	Venue changed deposit provider	Look-alike domain or unauthorized redirect
Clipboard differs from QR and page	None that should be ignored	Clipboard replacement or display tampering

Are you looking at the same account and funding method?

Many apparent address changes are context changes. Signing in with email instead of a wallet, choosing a personal account instead of an organization account, opening a regional product, or selecting a card/on-ramp flow instead of direct crypto can produce different instructions.

Start again from a bookmark or manually typed official domain. Confirm the visible account identifier without exposing it, the legal operator, the product, and the sign-in method. Then navigate through the account's own Deposit or Add Funds control. Do not use an address copied from email, chat, social media, a support direct message, or a sponsored search result.

If the platform uses multiple wallets or profiles, label your trusted record with the profile and login method. A destination is not “the prediction market address” in the abstract; it belongs to a defined account, asset, network, and route.

Do the asset, network, and memo all match?

Token names can look identical across different chains. A stablecoin on Ethereum, Polygon, Arbitrum, or another supported network may require a different destination or deposit contract. Selecting the wrong network can send a valid asset to a route the venue does not monitor.

Use a six-field check before comparing cosmetic details:

Account or profile identifier.
Deposit method, such as direct crypto, bridge, or processor.
Asset name and contract, when the interface provides it.
Blockchain network and chain identifier.
Complete destination address.
Memo, tag, destination note, or payment reference, including whether it is mandatory.

Do not infer the network from the first or last characters of an address. Some networks share address formats, and a syntactically valid destination can still belong to the wrong route. Read the venue's current supported-network notice and the sending wallet's selected network independently.

The general crypto deposit address verification checklist covers sender-side validation. This article addresses the narrower question of why a prediction-market receiving instruction changed.

How can you verify the full address safely?

Compare the address displayed in the authenticated deposit screen with the QR code or a second trusted device showing that same official screen. Check the first and last characters for quick orientation, then compare the entire value before approval. A partial match is not authentication.

Paste the destination into a plain, offline text field and compare it again with the official screen. If the pasted value changes, stop using the device. Microsoft's cryware analysis describes malware that monitors clipboards and replaces cryptocurrency addresses.［3］ A wallet-address poisoning history can also tempt you to select a look-alike entry, so avoid copying from recent transactions. Read how wallet address poisoning works for that separate threat.

Treat a QR code as another encoding of the instruction, not an independent authority. Confirm what the sending wallet decoded, including network, amount request, memo, and any contract call. Reject an unexpected approval, signature, or unlimited token allowance.

When is a small test transfer appropriate?

A small test is the last validation step, not the first. Use it only after the official domain, account, asset, network, address, and memo all match and the venue currently supports the route. The amount must be above any published minimum while remaining small enough for your risk tolerance.

Wait for the test to appear in the authenticated account ledger under the expected asset and route. A block explorer confirmation only proves that a network accepted a transaction to an address; it does not prove the venue credited your intended profile. If the test is confirmed on-chain but not credited, follow crypto deposit confirmed but not credited before sending more.

Do not send a second or larger transfer merely because support says “try again” in an unverified message. Obtain a case number through the official channel and preserve the transaction hash.

What signs point to phishing or account compromise?

Stop when any of these appears:

The deposit link arrived unexpectedly or uses a misspelled domain.
The page asks for a seed phrase, private key, remote-control session, or authentication code.
The address changes after copying, scanning, refreshing, or moving between official views.
A new browser extension, wallet prompt, or token approval appears without a clear reason.
Login history, email, withdrawal settings, or security keys changed without you.
Support pressures you to send immediately, split funds, or keep the instruction secret.

From a known-clean device, change the account password if applicable, revoke unknown sessions, verify MFA and recovery settings, and review the associated email account. Do not erase logs or transaction history. Preserve URLs, timestamps, screenshots with secrets redacted, the displayed and pasted addresses, network, memo, and transaction hash.

What can a VPN verify in this situation?

A VPN cannot authenticate a prediction market's deposit address, recover a blockchain transfer, validate asset support, or decide which account a processor will credit. Network encryption may protect traffic on an untrusted local network, but the authoritative destination remains the authenticated venue flow and its official documentation.

Use the online security guide for broader account protection. Do not mistake a secure connection for proof that the page, account context, or copied address is correct.

Summary

Stop before sending whenever a receiving instruction changes unexpectedly.
Rebuild context from the official account: login, product, funding method, asset, network, full address, and memo.
Compare the entire destination and decoded QR result; never trust history or clipboard alone.
Test only after verification, then confirm credit in the account ledger before increasing value.
Treat unexplained disagreement as a possible account or device compromise and escalate safely.

Frequently Asked Questions

Is it normal for a prediction market deposit address to change?

It can be normal when the network, account, product, or payment route changes, or when the venue deliberately rotates instructions. Only the current authenticated flow and official documentation can explain the specific change.

Should two blockchain networks show the same address?

Not necessarily. Some formats overlap and some venues assign separate destinations. Select the network explicitly and verify the venue supports the exact asset-network pair.

Can I reuse an address from a previous deposit?

Only if the venue currently confirms that the address remains valid for the same account, asset, network, and memo requirements. A prior successful transfer is not a permanent guarantee.

Is matching the first and last characters enough?

No. That is only a quick check. Look-alike addresses can share short prefixes or suffixes, so compare the full value on trusted views before approval.

Does a small test protect against a wrong network?

It limits the amount at risk but does not repair an unsupported route. Verify network support and all deposit fields first.

What if I already sent to the old address?

Do not send more. Preserve the transaction hash and deposit instruction, check the authenticated ledger, and use the venue's official recovery guidance. Polymarket, for example, documents a specific recovery process for certain missing deposits.［2］

Can support ask for my seed phrase to recover a deposit?

No legitimate recovery requires sharing a seed phrase or private key. End the conversation and contact support from the official site.

Should I scan the QR code with another device?

It can provide a useful second view, but inspect the decoded address, network, memo, amount, and action before approval. The QR code itself is not proof of ownership.

Disclaimer: This article provides general security information, not financial, investment, trading, legal, tax, recovery, or platform-specific advice. Blockchain transfers may be irreversible, and venue procedures and supported networks can change.

Sources:

Polymarket — How to Deposit — https://help.polymarket.com/en/articles/13369887-how-to-deposit
Polymarket — Recover Missing Deposit — https://help.polymarket.com/en/articles/13364241-recover-missing-deposit
Microsoft Security Blog — In hot pursuit of cryware — https://www.microsoft.com/en-us/security/blog/2022/05/17/in-hot-pursuit-of-cryware-defending-hot-wallets-from-attacks/

Sources checked 12 September 2026.

Related reading:

Prediction Market Deposit Address Changed: What to Verify