The thing with birth certificates — it’s pretty difficult to backdate them or retroactively issue legitimate ones without rising red flags in process that would

The thing with birth certificates — it’s pretty difficult to backdate them or retroactively issue legitimate ones without rising red flags in process that would trigger some background checks. So you need to assume identity of real person living or dead, which is more an effort than flat out bullshiting about your age. And if you are assuming identity of other person, you cant simply snatch birth certificate and issue new id, but with your photo — if such id was issued before, it would be routine check to match photos. Alltogether it greatly limits, but not entirely eliminates this kind of identity thieft. It is however other story to assume same identity (name, dob) but different parents (altought with same names) for inheritance or immigration fraud. That is pretty much undetectable in some circumstances.