In the Laws of Shabbos there are multiple layers of Rabbinical prohibitions built one on top of others to prevent possible transgression of Shabbos, for example, Muktze, or playing musical instruments, or using electricity etc.

I'm looking for similar Rabbinical prohibitions or precautions to prevent possible transgression of various forms of Gezel - fraud, using a Pikadon, Ona'a, regular Gezel, Mekach Tous, using property without permission, withholding payment from a worker etc.

What Halachic Rabbinical regulations were ruled on this subject?

See for details my previous question "how-to-beware-of-the-prohibition-of-onaa"