Exchanges screen wallets in seconds by tracing each deposit's transaction history against sanctions lists and risk databases, then flagging high-risk counterparties; Plastron runs the same kind of analysis so you can preview the result free.

When you send cryptocurrency to a regulated exchange, a compliance process begins before your funds are credited to your account. The exchange's automated systems check your depositing wallet against multiple risk databases, trace your transaction history to identify high-risk counterparties, apply behavioral scoring to detect unusual patterns, and produce a risk assessment that determines whether to credit the deposit, flag it for manual review, or reject it entirely. This process happens in seconds, operates entirely in the background, and produces a decision that you will never see unless it goes against you. The specific architecture varies by exchange, but most major platforms use a combination of commercial blockchain analytics tools (Chainalysis KYT, Elliptic Navigator, TRM Labs) and internal risk systems. The commercial tools provide address attribution — the entity labels that identify whether a counterparty is an exchange, a DeFi protocol, or a sanctioned mixer — and risk scoring based on their proprietary databases. Internal systems layer additional rules on top: the exchange's own blacklists, behavioral models trained on their transaction data, and jurisdiction-specific rules required by their regulatory licenses. The most important input to exchange screening is your wallet's counterparty graph — the map of which addresses sent funds to your wallet and which addresses you sent funds to. High-risk counterparties in that graph are the primary trigger for compliance flags. Behavioral factors — transaction timing, frequency, and pattern — are secondary triggers. Direct OFAC matches are immediate and categorical: no exchange that wants to maintain US dollar banking relationships will credit a deposit from a wallet with direct SDN exposure.