I am not sure what you mean by M2M cards...are you referring to the modules or the SIM cards?
There is no global certification that I am aware of. In the US, almost all carriers require FCC registration and PTCRB certification. In many cases the carriers will also require you to certify on their specific network.
In Mexico, it is managed by COFETEL....other locations have other certifications. If you have specific questions in a specific location, post them, and I am sure you will find an answer here.