In the U.S, digital signatures are typically used in regulated industries like life sciences for compliance with the FDA’s requirements for electronic signatures, often referred to as 21 CFR Part 11. Another example is the US Federal Government, where federal employees can be issued a personal identity verification (PIV) card that contains a PKI digital certificate for signing that complies with the US Federal Processing Standards.
Around the world, there are international standards that specify requirements for digital signatures and the methods used to authenticate a signer. Regulations include the Code of Civil Procedure in Brazil and Section 1803 of the Civil Code in Mexico, Electronic Identification, Authentication and Trust Services regulation (eIDAS) in the EU, and the Electronic Transactions Acts in Australia.