Originally Posted by sparks

Mexican pesos of course. Very little need for US$ in Mexico

Most people agree that ATM exchange rates are about the best you can get. There is always a 1% bank fee but who is getting that I'm unsure. Also some US banks will charge from $3-5 for ATM use or international fee. My credit union has no fee.

BTW ... the money transfers would only need to happen in the 3-4 months before applying for or renewing your FM3. INS only wants you to show the previous 3 months income.