Opening bank accounts or conducting formal procedures in México requires compliance with strict anti-money laundering (AML) rules. Banks typically demand immigration documents, tax registration (RFC), and proof of address. Many administrative acts—such as powers of attorney, company filings, or property transactions—require notarization. Government interactions are often formalistic, document-driven, and time-sensitive. Inconsistencies between immigration, tax, and banking records are a frequent source of delays and legal complications for foreigners.