If you found a 90 year old Jew who said she was a 10 year old kid when resettled from Treblinka and grew up in the resettlement, or a 95 year old Eastern European who said he saw this resettlement, or a diary from someone living at the time referring to the existence of this resettlement, this would be the best evidence we have yet for the ridiculous "resettlement thesis", according to which millions of Jews were moved out of the camp system into some permanent resettlement.
The fact that deniers do not actually go and look for evidence of what happened to the disappeared millions of Jews in the camp system is revealing. They seem to implicitly recognize that this would be fruitless, and that millions of Jews did indeed "disappear" in the Nazi camp system (and were not transited out of it into resettlement(s)).