BIN scamming is a fraud scheme. It occurs when a fraudster calls impersonating someone from your bank, claiming that your account information has been compromised. The scammer may give you information to try to gain your trust. Once you're hooked, they try to confirm the number of your card and begin by asking where you bank. When they have that information, they give you the bank identification number and ask that you confirm the remaining digits on the card along with any other information they can get from you.