When a person gets a Mexican FMM online, when do they do the background check?

2018-03-09 09:03:15

If a person applies for a Mexican FMM online, will the background check be done immediately, and more importantly, before the FMM is made available to print out, and then at immigration you only have to get an entry stamp for validation and no further background check is done?

Or, is the FMM only filled out and paid for ahead of time when done online, and the actual background check is done in person when at immigration in Mexico?