UiO has two approved solutions for digital signatures:
Posten Signering
Posten Signering is used when the signers have a Norwegian identity number.
Yousign
Yousign is used when you need to collect signatures from individuals without a Norwegian identity number. A coordinator preparing to collect signatures with Yousign must have a license. Each license costs approximately NOK 5000 per year, and the faculty ordering the license will be billed. Note that only those initiating the signing process need the license, not the signers themselves.