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Clear steps for SAT, CFDI, and tax obligations.

Businesswoman authenticating an SAT invitation letter and preparing a SAT clarification.
Invitation Letter11 min read

SAT Invitation Letter: How to Validate, Respond, and Clarify Differences

Authenticate the SAT invitation letter, identify the discrepancy, reconcile documents, and respond through the indicated channel with...

Andrés Chávez · Sep 12, 2026Read guide →
Taxpayer reviewing a communication from the SAT and organizing a response with their advisor.
SAT Communications9 min read

What to Do If the SAT Contacts You: Invitation Letter, Requirement, or Notice

When you receive a message from the SAT, verify its authenticity, distinguish between an invitation letter and a requirement, and...

Juan Elizondo · Aug 30, 2026Read guide →
Miguel González explaining in a friendly way how to verify a supposed email from the SAT.
Tax Mailbox10 min read

What to Do If You Receive an Email from the SAT? 3 Steps to Verify It Without Falling for Scams

Receiving an email from the SAT doesn't automatically mean a fine or audit: verify its authenticity and confirm the notice within your...

Andrés Chávez · Jul 10, 2026Read guide →
Entrepreneur asking an advisor key questions about registration, invoicing, and compliance.
Guías6 min read

SAT, RFC and CFDI questions for Mexican SMBs

Answers for Mexican SMBs about RFC registration, tax regimes, e.firma, CSD, CFDI 4.0, monthly filings, the Tax Mailbox and SAT records.

Jimena Cruz · Apr 22, 2026Read guide →