Specific technical modifications related to the validations Authorised Certification Providers (PACs) should make to electronic invoices sent to them for certification.
Modifications were introduced in Annex 29 of the MFR that specifically accounts for the rules PACs should follow as providers of certification services for the Mexican tax administration (SAT).
Source Sovos
See also Understanding Mexico’s Miscellaneous Fiscal Resolution for 2021 and its Modifications (Part I)
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