A Mexican citizen who has no identification with a photograph can still obtain a voter card from the National Electoral Institute (INE). The applicant may present dos testigos, two witnesses. According to TV Azteca, one witness must be registered in the same municipality and the other in the same state, and each may act as a witness only four times in 120 days.
At least one municipality does something similar. In Temixco, Morelos, a constancia de identidad, a certificate of identity, requires two witnesses, each with a copy of an INE card. The first witness must be a close relative who lives in the municipality.