|June 15, 2010 – Mexico has implemented new banking regulations regarding USD currency.
Newly Released Mexican Regulations Imposing Restrictions on Mexican Banks for Transactions in U.S. Currency
Mexican banks can exchange USD currency for non-customers [persons without a valid bank account, i.e.: tourist] but many banks have recently applied restrictions allowing only customers to exchange USD currency to pesos.
Banks are limiting the amount an individual customer can exchange on a monthly basis forcing some Mexican vendors to stop accepting USD. These vendors will only accept payment in pesos.
ATMs dispense pesos.
Money exchange stores [casa de cambio] are still offering USD exchange services. This could change at any time.
Exchange your currency before you leave for Mexico taking Mexican Pesos only with you or be prepared to use ATMs.