Perhaps it is appropriate to tell the story of R Yaakov Kamanetzky coming to America. He originally came as a Meshulach for the Slabodka Yeshiva. He was given a pile of cards by the yeshiva’s office in NYC which had the name, address and “last year’s donation” for each person who he was to approach.
When a donor gave him a check, he asked why the donor had reduced his donation from the previous year. The donor became angry and showed R’ Yaakov his cancelled check from the previous year – which was not the amount listed on the card.
At that point, R Yaakov returned to the office and quit – he would not be part of a dishonest operation.