An OFAC screen on Base starts with the network choice. Paste the 0x address, select Base, and read the sanctions result next to the balance and the count.
Note contents
Open the note with the address, the network and the time of the check. Then add the OFAC outcome. Name a sanctioned party only if the result names one.
Limits of a clear result
A clear result covers the sanctions screen on that address and nothing wider. Third-party blacklists are not part of the free Base check.