Latvia also has ID cards with embedded certificates that can be used to sign documents/login. These cards are optional (passport is mandatory, ID card can be re

Latvia also has ID cards with embedded certificates that can be used to sign documents/login. These cards are optional (passport is mandatory, ID card can be requested) for now but will be required from 2023. Estonia/Latvia/Lithuania also have SmartID (although this is a private company service) which is an app on your mobile device and is used for logging in banks. SmartID account is issued by the bank (lowest level, can only log in issuer bank) or by yourself using your ID card (highest level, can log in any service that supports SmartID as well as document signing).