Exchanges usually freeze crypto when automated screening flags the deposit for sanctions, mixer or indirect counterparty exposure — not because you did something illegal; Plastron helps you identify the likely AML trigger free.

Waking up to a frozen exchange account is one of the most stressful experiences in crypto. The exchange provides almost no information about why it happened, the timeline for resolution is vague, and the documentation request that follows is often confusing and open-ended. Most users assume the worst — that they have somehow done something illegal — when in fact the majority of exchange freezes affecting ordinary users are triggered by indirect exposure they were never aware of. There are five primary reasons exchanges freeze crypto accounts. The first is direct OFAC sanctions exposure: your wallet directly transacted with an address on the OFAC SDN list. This is the most serious category and the hardest to resolve. The second is mixer involvement: your wallet deposited to or withdrew from a cryptocurrency mixer, most commonly Tornado Cash. Mixer use creates High or Critical risk flags at every major exchange regardless of the reason for the mixer interaction. The third is indirect counterparty risk: your wallet received funds that trace back to a flagged address — a hack, a sanctioned entity, or a mixer — even though you had no direct connection to the flagged address. This is the most common cause of unexpected freezes for DeFi users. The fourth is unusual transaction patterns: rapid-fire transactions, large round-number transfers, or unusual timing anomalies that trigger behavioral scoring in the exchange's automated system. The fifth is identity verification issues, which are separate from AML risk — incomplete KYC, expired documents, or suspected account takeover. Understanding which of these caused your specific freeze is the first step toward resolving it efficiently, and Plastron can help you identify the AML and sanctions-related causes.