Interesting from the FBI Hitler archive. Woman claims to have seen man in Charlottesville, VA that looked like Hitler.
https://vault.fbi.gov/adolf-hitler/adolf-hitler-part-01-of-04/view
Hitler's marriage certificate, private will and political testament were sent to the FBI for handwriting analysis before forwarding to the President and found genuine. The attachments were labeled as Q1-Q17. It appears that K1-K17 were the comparison samples.
https://vault.fbi.gov/adolf-hitler/adolf-hitler-part-01-of-04/view
If you say rabbit three times around a campfire the smoke will move away from you. It seems to work.