If a manual search fails, you can attempt to capture the user's IP address. This reveals their Internet Service Provider (ISP) and an approximate geographic location (city or region), though it can be masked by a VPN.
. However, you can use a combination of profile analysis, digital tracking tools, and legal channels to narrow down who is behind the account. 1. Manual Profile Analysis how to trace a fake facebook account location
Every Facebook profile has a unique ID.