Quick answer
Use an ID mismatch to identify the documented scam
Roblox describes catching scammers and jailing them when the IDs disagree. Compare customer and package information rather than guessing from appearance alone.
Scammers and robbers should not be treated as interchangeable. The description gives an ID-mismatch rule for scammers and separately mentions robbers among shift encounters. It does not give a robber-identification rule, an arrest keybind, a spawn schedule or a penalty table. This guide cannot verify those details.
Source checked September 27, 2026: official Roblox description. Named features are confirmed; the missing rules above remain unverified.