What cash register receipt? All I ever get is the copy of the small packet label with the PO stamp on the back. My packets are all weighed and stamped before I get to the PO so I don't buy postage for each packet separately - does that mean I'd be SOL??
The stamped small packet label should be sufficient, the postage receipt was required during the transition period from the old CN22 to the new two part form. If they don't agree just scream and ask to be bumped higher up the food chain.
Personally I have only filed a couple of small packet claims (both before the two part form), the entire claim was done over the telephone and NO documentation was required (claim amounts about $20 & $45), I had my refunds in less than two weeks. I currently have a couple of missing items I will be filing for shortly and I'll report the results when I have them.
One possible reason for the easy claim may have been that I have a CP account number, although I don't use the account (95% lettermail / small packet) I had to set it up to order supplies. This may give them the impression you are something more than a casual mailer and I expect it allows them to access your claims history and know that you don't have a record of a high rate of claims.
Ben

"What else could I do? I had no trade so I became a peddler" - Lazarus Greenberg 1915

"What else could I do? I had no trade so I became a peddler" - Lazarus Greenberg 1915
- answering Trolls is voluntary, my policy is not to participate.