Stalin famously ordered people he had killed erased from photos.
This checks out, here's an article about it: https://www.history.com/news/josef-stalin-great-purge-photo-retouching
So why are you downvoted? Maybe because your view is too optimistic? And the problem isn't only with autocratic regimes. But much more general.
How do we validate anything, when everything can be easily faked?