e.firma (Fiel): Who Qualifies and What You Get
Learn how to obtain your digital signature to sign legal documents and manage your tax obligations in Mexico.
The e.firma (Fiel) is a digital signature that allows you to legally sign documents and file your tax returns online. It serves as your official electronic identity for interacting with tax authorities.
Who it's for
This scheme is available to all Mexican taxpayers. Whether you are an individual managing your own finances or a business owner, any person registered as a taxpayer is eligible to obtain this digital tool to meet their legal obligations.
What you get
When you obtain this scheme, you receive a digital signature. This tool is essential for performing various administrative tasks online, such as signing various types of contracts and submitting your required tax returns. It provides a secure way to verify your identity through digital means when using government platforms.
What it costs you
There is no direct monetary fee to obtain this signature. However, the process requires a significant investment of time because you must attend an in-person appointment at a SAT office to complete the necessary steps. Once your digital signature has been successfully issued, it remains valid for a period of 4 years.
The catch to know
The most important thing to remember is that this is not a permanent credential. You must be proactive about renewing your digital signature before it officially expires. If you miss the expiration date, you cannot simply renew it online; you will be required to go back to the SAT office in person to start the process over again.
How to apply
- Schedule an appointment at a SAT office to handle your request.
- Attend your scheduled appointment in person at the designated office.
- Complete the necessary identity verification steps as instructed by the officials during your visit to receive your digital signature.