What is one method a teller can use to verify the authenticity of a check?

Verifying a check with the issuing bank is a reliable method for confirming its authenticity. When a teller contacts the bank that issued the check, they can confirm whether the check is genuine, if it has sufficient funds, and whether the account from which it is drawn is active. This direct communication with the bank allows the teller to obtain crucial information that ensures the check is valid and reduces the risk of accepting counterfeit or fraudulent checks.

While checking the balance of the account holder, asking for identification, or examining the color of the check paper may provide some level of assurance, they do not offer the same level of verification as directly confirming with the issuing bank. Balances can change or be manipulated, IDs can be forged, and the color of check paper is not a definitive indicator of authenticity. Thus, verifying the check through the issuing bank is the most definitive method available to a bank teller.