Mexican Currency is called the Peso.
Below are the Mexican Peso notes currently in circulation. The 1000 Peso note is a rare find and may not be accepted at all outlets in Cancun. Guard your small change with your life! Nobody seems to have change and you are almost always asked for the odd peso or two to round up or down.
It almost seems to be a competition to see who can break down the larger notes and hoard the highest number of small notes – be a part of it – they will come in useful!
The symbol for Mexican currency is the Dollar sign $. In Cancun both currencies are commonly used in the tourist areas. It’s important to realize therefore when it is being used to denote USD and when it is being used to signify Pesos.