Fakers of all nationalities proliferate in this industry. Where most of them turn up is in those jurisdictions where they believe they have the best chance of success and the least chance of genuine scrutiny.
Some years ago I applied for a contract through a NZ based agency, and frankly they didn't give a damn whether what I presented them was for real or not - their only interest was to fill the 'slot' and pull their commission. About 3 or 4 pilots were exposed during that contract for fraudulent misrepresentation of either experience or qualifications. It's a fact of life - challenge them through your CAA or company and name them ..... sooner or later they will be exposed.