This is probably something that happened many times after World War II, when documentation was lost.
Here's the scenario:
A rabbi, who had led a kehila (congregation) in a small town in Slovakia, emigrates post-World-War-II to the USA, but when he arrives in New York, he has no proof of his smicha (rabbinical ordination).
A few people in New York knew him before, in Europe, and are willing to testify that they know him to have had smicha, and that he was the rav of their kehilla.
- To what board/court/Bet Din would they have gone?
- Is there anywhere now to go back and find out who the witnesses were?
- Did the court/Bet Din issue him another sort of document in lieu of the original?