An exchange usually blocks a deposit when its compliance system flags sanctions, mixer or stolen-fund exposure in the sending wallet's history; Plastron lets you identify that exposure free before you deposit.
Exchange Deposit Blocked — Understanding Why
A blocked exchange deposit means their AML system flagged your wallet. Before you contact support, find out exactly what triggered it.
If your exchange has already frozen funds, start with why exchanges freeze crypto and what to do.
When a cryptocurrency exchange blocks a deposit or freezes an account, most users have no immediate idea why it happened. Exchanges are legally prohibited from disclosing the specific details of an AML investigation — the same confidentiality rules that govern bank suspicious activity reports apply to exchange compliance actions. What users typically receive is a generic notification asking for source-of-funds documentation, with no indication of which transaction or counterparty triggered the review. This information asymmetry puts users at a significant disadvantage. Without knowing what the exchange flagged, it is nearly impossible to prepare an effective response. You might spend days gathering documentation for an irrelevant transaction while the actual flag — a single interaction with a mixer-linked address three months ago — goes unaddressed. The most common triggers for exchange deposit freezes are OFAC sanctions exposure (direct or indirect), mixer involvement (especially Tornado Cash interactions after August 2022), receipt of funds that trace back to known hacks or exploits, and wallets with high darknet or fraud exposure. Less commonly, an exchange may flag a wallet solely based on its counterparty graph — if a large proportion of your transaction counterparties are unidentified or have unknown entity types, some exchanges treat that as elevated risk. Running a Plastron scan immediately after a deposit is blocked gives you a map of your wallet's risk profile from the outside — the same perspective the exchange compliance team is reviewing.
Exchange Deposit Blocked, and what a scan shows
Identify the Most Likely Freeze Trigger
Plastron's scan shows your risk score and the specific flags that drive it — sanctions exposure, mixer involvement, stolen fund links, darknet contacts, fraud indicators, and phishing-linked counterparties. If your score is High or Critical, the top-scoring category is almost certainly what triggered the exchange's system. Knowing the trigger before you contact support lets you prepare the right documentation instead of responding blindly.
Counterparty Detail for Support Responses
The scan report identifies specific flagged counterparty addresses, entity labels, and transaction volumes. When an exchange asks for source-of-funds documentation, they need you to explain the origin of funds from specific addresses. Plastron's counterparty analysis gives you those specific addresses and context — which DeFi protocol, exchange, or risk-flagged entity sent you funds, and what the transaction amounts were.
Pre-Emptive Screening Before Future Deposits
After resolving a freeze, many users return to the same exchange without screening their wallet first, and encounter a second freeze. Running a Plastron scan before every significant deposit lets you identify any new exposure that has appeared since your last scan — a wallet you interacted with last week may have since been flagged, and catching that before depositing protects you from a repeat freeze.
What counts as a red flag
Inside the screening corpus
Measured from Plastron’s own screening corpus, rebuilt on every deploy.
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Common questions, answered
Where to look next
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