Electronic Signature IMSS
Please be informed that on July 16, 2026, the Agreement ACDO.AS2.HCT.290626/176.P.DIR, issued by the Technical Committee of the Mexican Social Security Institute (“IMSS”), regarding the implementation of the e.signature as the only valid digital certificate for carrying out enrollment movements and linking legal representatives exclusively through the Virtual Desk (the “Agreement”) was published in the Federal Official Gazette (“DOF”) and entered into force on July 17, 2026.
By means of the Agreement, the exclusive use of the e.signature issued by the Tax Administration Service (“SAT”) was approved for acts carried out by employers or obligated parties when they choose to perform such acts through electronic means of communication. Such acts will have the same legal effects as documents submitted with a handwritten signature and, consequently, the same evidentiary value granted to them under the applicable provisions.
The registration of legal representatives or authorized people must be carried out exclusively through the IMSS Virtual Desk, using the e.signature of both the represented party and the attorney-in-fact.
It is worth noting that the Agreement repealed the use of the Employer Electronic Identification Number (“NPIE”) and its digital certificate issued by the IMSS for carrying out acts before the IMSS.
In this regard, the Agreement granted a transition period of 90 calendar days, counted from the publication of the Agreement in the DOF, for employers or obligated parties to migrate to the exclusive use of the e.signature.
For more information, please feel free to contact our team at:
Francisco Peniche Partner
francisco.peniche@creel.mx
Omar Zúñiga
Partner omar.zuniga@creel.mx
Jorge Correa Partner jorge.correa@creel.mx
Julio Álvarez Partner
julio.alvarez@creel.mx
Eduardo Brandt
Partner eduardo.brandt@creel.mx
Alicia Abúndez Associate alicia.abundez@creel.mx
Mexico City, on July 20, 2026. | 
