Sanctions screening
Labels, clusters and risk scores are heuristics built from public data: probabilities, not legal determinations. Sanctions data comes from the US Treasury OFAC SDN list; always confirm a match against the official list before acting. Wardcrest never asks for keys and cannot move funds.
Questions
What is the OFAC SDN list?
The US Treasury’s Office of Foreign Assets Control publishes the Specially Designated Nationals list of people and organisations under sanctions. Since 2018 many entries include the crypto addresses they use. US persons are generally barred from dealing with them, and many exchanges freeze funds that touch them.
Which networks can I check?
Bitcoin, Ethereum and every EVM chain, Tron, Litecoin, Bitcoin Cash, Dash, Zcash, Monero, XRP and Solana addresses. Paste the address as it appears in a wallet; Wardcrest works out the network.
How current is the list?
Wardcrest imports the addresses from the official SDN data twice a day, using the open-source extraction maintained at 0xB10C/ofac-sanctioned-digital-currency-addresses. The page shows when it last updated.
Does “no match” mean the address is safe?
No. It means the address itself is not listed. Funds can still come from a sanctioned address one or two hops away, or from a hack or scam that is not sanctioned. A full address report checks the counterparties too.
Do you keep the addresses I check?
No. Wardcrest counts that a check happened, for its own usage statistics, but does not store the address or tie the check to you.