Log in to the Diya portal. Among the popular services, select "Signing documents". Click "Sign document". Download your electronic signature from media or drag it from a folder on your computer. Enter the password for it. Select the file you want to sign: drag it from your computer or select it from an external storage device. Click "Sign". As a result, you will receive a file with complete data for online verification. Click to save it.
You can open an "envelope" in Privat24 through the "Envelopes" menu or the "Wallet" menu.
You can familiarize yourself with the conditions for accepting Ukrainian citizenship on the official website of the State Migration Service of Ukraine: https://dmsu.gov.ua/poslugi/nabuttya-gromadyanstva-ukrajni/prijnyattya-do-gromadyanstva-ukrajni.html