The AA and A type Mexican currency bills were demonetized on January 1, 1996. This means that they can only be exchanged at a designated canje. The bill's value is its face value, divided by mil. The AA and A type bill is a very common currency in Mexico and is used for innumerable commercial transactions. However, the bills are often misused or handled carelessly. In addition, the frequent usage of AA and A type bills may result in the bills' devaluation.

Billetes Monedas MX is an iOs and Android application that can identify different types of currency. It can compare the image of a bill with an actual one and tell you if it is a fake or not. Another popular application for identifying counterfeit bills is the Detector of Falsos (also available for Android). It uses an ultra-violet light to detect counterfeit currencies. The app can only detect a fictitious bill in a specific area.

The Banco de Mexico has changed its currency frequently. It is the first currency in the world to feature a silver, copper, or aluminum center. The average life of a 50 peso bill is 32 months, and a 100 pesos bill is 39 months. The Banco de Mexico's new denominations of the Peso are the same as the old ones, but they are more durable and secure.