I would say that it goes to Mexico to their agency...is the distributor going to submit it to the agency?
Do you have a local subsidiary that could submit it directly to the agency so it goes directly from the sponsor to the agency? I'm assuming you are the sponsor but I don't know...never assume, right?
Also it depends on how the contract between your company & the distributor in Mexico has been established. Have someone look into those details. Where does the responsibility falls?
Here is a sample of a CFG issued by FDA:
http ://www .brownmed .com/ files/9413/3710/4992/Certificate_to_Foreign_Government.pdf - DEAD LINK - Try
Certificate_to_Foreign_Government.pdf at DuckDuckGo
Also check what type of legalization requirements the agency needs...lately Mexico has tighten up their requirements. Once you have your CFG, scan it & keep an electronic file of it as copy/proof of what will be submitted to Mexican agency. Also not a bad idea to check with Mexican agency on how they want this CFG document so you requested as they will need to obtain it.
Good luck