Yes, under Mexican nationality law, you may automatically acquire Mexican citizenship if your father was born in Mexico and meets certain conditions. This pathway allows for dual citizenship with the United States, but requires formal registration.
To obtain proof of citizenship, you must register your birth with the Mexican Civil Registry (Registro Civil) in the state where your father was born. Procedures vary by state, so contact the nearest Mexican consulate or the relevant Civil Registry office for specific instructions.
Once registered, you hold dual citizenship. Be aware of potential implications for taxation, military obligations, and other legal matters in both countries. Consulting an immigration attorney or legal professional familiar with both jurisdictions is highly recommended.
Requirements and processes can change; always verify with Mexican authorities for the most current guidance.