ID number and tax ID for foreign buyers (CURP and RFC): when you need them
Many notarios now ask foreign buyers for a Mexican tax ID (RFC); residents also have a CURP. A non-resident can often close with a passport, but an RFC helps later when you rent, sell or open a bank account.
Why it matters
Having your RFC on the deed and keeping proper invoices (CFDI) documents your cost basis for a future sale.
Who helps
The notario tells you what they require; SAT issues the RFC; the CURP comes with residency.
What to do: Ask your notario whether you need an RFC or CURP to close.
Documents
- Passport
- Resident card if you have one
- Proof of address
Costs Estimate
- SAT registration: no official fee (estimate; confirm).
- Accountant help: often a modest flat fee (estimate).
Estimates only. Get written quotes.
Common mistakes
- Your name spelled differently on the passport, RFC and deed.
- Losing CFDI invoices for closing costs and improvements.
Say it in Spanish
- ¿Necesita mi RFC para firmar la escritura?
Do you need my RFC to sign the deed?
Terms
Confirm the details for your case with your notario or attorney.
Common questions
Do I need an RFC to buy?
Many notarios ask for one. Even if not required, it helps later when you rent or sell.