Has anyone encountered document certification via the Internet? Does it really work? And which service is reliable and convenient?

After a telephone conversation with a lawyer, I realized that I urgently needed a notary confirmation of the transaction. It was already evening, I was in a hurry. I decided to act quickly - I entered "notary online" into the search and chose https://onenotary.us/ offers. A simple procedure, everything is official, and most importantly - no waiting. This is the case when the service works exactly when it is really needed.