[onlylewis]

Question, what type of documentation is needed to register as a presidential candidate?

[freespirited]

Question, what type of documentation is needed to register as a presidential candidate?

The candidate has to file to be on the ballot in each state. So you have 50 states each with their own forms/requirements.

I don't know if any documentation is needed. My best guess is that the process typically works on the honor system. You self-certify that you are eligible.