What happens if I sell a part just after I verified, and approved a transaction with another dealer?

If a part is sold after the verification process, you simply short ship the part, and advise the other Parts Manager of the change. The dollar value in the shortage will just expand the difference in the parts exchange transaction. This isn’t a problem as when dealers invoice each other, a slight expansion of value between the two dealers only means the check between the two dealers is different more so by the amount short shipped.