I have an assignment in Mexico City working for a Canadian agency. Is there anything specific I should do to make my entry as easy as possible? Is a letter from my client required (ie – stating that I will be working for a Canadian firm and will be paid in Canada). Is it wise/necessary to use my Carnet? I seemingly only use it for US travel – its not a requirement for Europe and Asia. Any advise would be greatly appreciated.

Many Thanks,
Evan