Countries, can construct their own policies for their domains. Sometimes they omit things or allow things that other registries prohibit. They also may require

Countries, can construct their own policies for their domains. Sometimes they omit things or allow things that other registries prohibit. They also may require things like being a resident ect... However, quickly looking at some ICANN's policies take look at number 3. Wheather any of this applies to .mx depends on how the policies for that ccTLD are setup. https://www.icann.org/resources/pages/approved-with-specs-2013-09-17-en#registrant https://www.icann.org/resources/pages/approved-with-specs-20... Also if you are thinking of filing a complaint keep in mind ICANN is quite bureaucratic so nothing may happen or take ages. -edit- if the domain in question is important I suggest talking to someone well versed in the minutia of all this.