Sign Your Documents with Email OTP

Email OTP is an electronic signing method that uses a one-time password sent to the registered signer's email address. To verify their identity, the signer must enter their full email address, then input the OTP received to complete the document signing process.

Signing documents electronically with an Email OTP is extremely user-friendly and straightforward. The signer is prompted to confirm their email, then they are sent a one-time password via email to complete the signing request.

1. Email OTP provides broad accessibility, allowing anyone with an email address to sign documents.
2. Signers can complete documents from anywhere in the world, with most countries automatically supported in Nitro Sign—requiring only an email address.
3. This method is highly user-friendly, eliminating the need for additional tokens or smart-card readers.
4. It offers a seamless and intuitive signing experience while ensuring strong identity validation.

The answer is yes! In Europe, the U.S., and most countries around the world, digital signatures are legally binding and recognized in their local legislations, such as UETA eSign Act in the U.S. and Canada, eIDAS in Europe,  and ZERTES in Switzerland.

Let's take a closer look to the Electronic Identification and Trust Services Regulation (eIDAS Regulation 910/2014/EC). eIDAS forms a legal framework for accepting electronic identities and signatures in Europe. According to this regulation, the Email OTP signing solution is among the most advanced Simple Electronic Signatures (SES) methods available through Nitro Sign. When customers implement an onboarding procedure—where the email address is linked to the identity of the person—the SES status can even be upgraded to an AES (advanced electronic signature) status.

If you want to know more about different signing methods that Nitro Sign offers and their legal validity, please read our legal white paper conducted by DLA Piper.