Mexico banks implement new credit‑guarantee rules and cash‑deposit ID requirement

New regulations issued by Mexico’s Treasury (SHCP) and the banking regulator (CNBV) modify the rules for collateral on bank loans. Effective 3 July 2026, a third party – such as a family member or business partner – may provide guarantees in the form of deposits, cash, certificates of deposit, promissory notes or other highly liquid instruments, provided a written, irrevocable authorization is given to the bank. Banks have six months to revise internal policies and one year to adjust guarantees that were established before the rule took effect.

Separately, the Association of Banks of Mexico (ABM) announced that, starting 1 July 2026, cash deposits or withdrawals of 140,000 pesos or more at a teller must be accompanied by an official ID (e.g., INE credential or passport). Banks may also request biometric verification such as fingerprints or facial recognition. The measure aims to curb fraud and money‑laundering, complementing other AML adjustments already in place for 2026.