[cleyeo]

Originally Posted by Black Page

That's a bit paranoid. Then you would never leave your passport at the hotel desk...

If I need some real passport information, just to register a SIM, I can find plenty of passports from hotel desks. I give a tip, and some guy will give me a photocopy.

But if you want to register a SIM using other passport data:
1) if you go to a honest shop, they need to see a real passport, not just getting a number;
2) if you are not a honest employee, you don't need a real passport. Just enter any number. The system cannot check if the foreign passport number is authentic (I don't think they have a system connected to the Ministry data base).
=> in short, don't worry.

fully agreed.