Son has dual US-Mexican CitizenshipI think this issue gets muddied because the US does not recognize the citizenship of other countries and will always consider you a US citizen. However, this does not preclude a person from obtaining another citizenship. In the past, renouncing citizenship from other countries was required. However, the US has allowed dual citizenship for some time.
Mexican consulates have procedures in place for people who were required to renounce their citizenship in the past and would like to reclaim their Mexican citizenship now that US laws have changed. Check with your local consulate for details.
My son has dual citizenship from Mexico and US citizenship by birth. My ex husband and I registered him at the Mexican consulate in San Diego. He was issued a Mexican birth certificate and can obtain a Mexican passport. Technically when he travels to Mexico, he should ALWAYS present his Mexican documents, and when he returns to the US, he must present his US documents.
I will note the process we followed below. However, Mexican consulates are notorious in requiring different documents/procedures. You should check with your local consulate on the procedure there.
In San Diego, the following was required:
--proof of Mexican citizenship of parent(s). 2 forms of ID were required. We presented a passport and Mexican birth certificate.
--US birth certificate (original)
--two Mexican witnesses which needed to present Mexican proof of identity (Credencial electoral or Passport).
--pay a fee
Appear at the consulate and fill out paperwork. Present all ORIGINAL documents to the consulate for verification purposes. You must include the witnesses proof of identity documents at that time. The Registro Civil (Civil Registry) at the consulate provided us with an appointment for the next day.
Appear the next day with your witnesses. Parents and Witnesses sign documents and they are certified by the Registro Civil. Proof of identity documents were returned and that was it!