La Poderosa: firma con e.firma

Sign contracts and PDF documents with your e.firma (the digital certificate issued by Mexico's tax authority, SAT), in the order you choose, and verify any signed document by its folio. HOW IT WORKS • Upload a PDF (or share it to La Poderosa from WhatsApp, Mail or Files) and invite the signers by email. • Each signer gets their own link, reviews the document and signs with their e.firma. Your private key and password never leave your device: only your certificate (which is public) and the signature travel to the server. • Keep your e.firma on your phone protected with Face ID or fingerprint, and sign next time without hunting for files. • Every signature gets a third-party timestamp. When everyone has signed, the document is sealed and anyone can verify it by folio at lapoderosa.app. LEGAL VALUE The signature applied is an advanced electronic signature backed by a valid SAT certificate.…