Why look up a Bitcoin address before sending
On-chain transactions are final. Once funds leave your wallet they cannot be recalled, charged back, or frozen by a third party. Three seconds of due diligence on the receiving address — broker, "investment manager", marketplace seller, or recovery firm — is the cheapest insurance in crypto.
What a flag actually tells you
- Confirmed scam report — at least one GACS user filed evidence against this address.
- Sanctioned cluster — the address belongs to an OFAC-listed entity (Lazarus, mixers, ransomware).
- Drainer wallet — the address has been observed sweeping funds from victims after a malicious signature.
- Co-funding link — the address shares funding hops with a known-bad wallet, a common pattern for scam-ring deposit addresses.
When the result comes back clean
A clean lookup means no red flags in the public datasets right now. It does not prove the counterparty is honest — only that they are not yet reported. For high-value transfers, also: search the address on Google in quotes, check the block explorer for transaction history depth, and verify any business identity independently of the link or DM you received.
