IMSS Digitalises the Employer Identification Card: what companies need to know

8 September 2026

The Mexican Social Security Institute (IMSS) has announced the digitalisation of the Employer Identification Card (Tarjeta de Identificación Patronal - TIP), the document through which employers authorise individuals to carry out procedures and formalities before the Institute.

From 10 September 2026, this new format will be available through the IMSS Mailbox (Buzón IMSS), replacing the traditional system of issuing and physically managing the card.

What is the Employer Identification Card (TIP)? 

The Employer Identification Card is the document that allows employers to appoint representatives to carry out various in-person procedures before the IMSS, including:

Submission of written communications.
Submission of affiliation-related movements.
Clarifications regarding collection matters.
Procedures related to audit and inspection actions.
Procedures relating to agricultural workers.
Other administrative procedures before the Institute’s Subdelegations.

Main change

Through this measure, the IMSS replaces the physical TIP with an electronic document managed through the IMSS mailbox.

Previously	Now
The TIP was issued in physical format. Updates to representatives had to be carried out in person. Replacement due to theft, loss or damage required attendance at the corresponding Subdelegation.	Issuance will be fully digital. Consultation and administration will be carried out online. IMSS personnel will verify the validity of authorised representatives in real time. It will no longer be necessary to present a physical card at service counters.
Requirements to obtain the digital TIP
1. Have an Active IMSS Mailbox	2. Have a Valid e.firma
To access this new scheme, the employer must: Access the IMSS Mailbox. Authenticate using a valid SAT e.signature (e.firma). Register an email address. Register a mobile phone number. Accept and electronically sign the terms and conditions.	The authorisation and administration of the Digital TIP will be carried out using the e.firma issued by the SAT.

Representative appointment

The Digital TIP will allow the registration and administration of up to three authorised individuals per Employer Registration Number, who may carry out the in-person procedures authorised by the employer before the Institute’s operational areas.

Information and security mechanisms included in the digital TIP

The card will include:

Unique transaction reference number.
QR code.
Employer Registration details.
Identification of authorised individuals.
Original string.
Digital seal.
Certificate serial number.
Details of the e.firma used for authorisation.

Benefits for Employers

Among the benefits of this new tool are:
Immediate and free issuance.
Available 24 hours a day from any location.
Elimination of the risk of loss or theft of the physical card.
Reduced administrative burden.
Immediate updating of representatives.
Enhanced security through electronic validations and e.firma.
Real-time consultation by the IMSS.

Recommendations

With the entry into force of this new scheme, we recommend that companies:

Verify that the IMSS Mailbox is active.
Review that the legal representative’s e.firma is valid.
Confirm who the authorised individuals will be.
Update internal controls regarding authorisations for procedures before the IMSS.
Prepare to replace physical TIP cards from 10 September 2026.

The implementation of the Digital TIP represents a further step in the modernisation of IMSS electronic services, strengthening authentication mechanisms through the e.firma and simplifying the management of employer authorisations. In this context, companies should assess the operational impact of this measure in a timely manner to ensure the continuity of their procedures and dealings with the Institute. 

Do you need support to implement this change?

Our team of specialists can help you assess the impact of the Digital TIP on your processes, verify compliance with the new requirements, and support you in updating your internal controls and authorisations before the IMSS.

For further information or personalised advice, please contact our experts.

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