score:3
As outlined in the related question, there could be several reasons:
The "visa" is a residence permit. In Russia it has the form of a passport booklet.
Russia doesn't recognize the applicant's state of citizenship (for example, Kosovo), so they put their visa sticker on a separate piece of paper.
You lost your passport after entering Russia and need to show proof of the legality of your stay.
You don't have a passport at all, so there's no place where to put the visa (e.g. you're the British Queen).
Overall I wouldn't count on it as a regular tourist.