Shown below from my collection is a stock trade receipt from Hong Kong. I am using it to illustrate how holes can be randomly punched in revenue stamps due to a company's two-hole method of filing receipts, as mentioned on another recent thread on this forum. As you can see on the back, the $30 Hong Kong revenue stamp received a punch hole per chance as it was in the way. This shows you one of the ways in which stamps can receive random punch holes that were not punched as a means of cancellation.

Linus