For twenty years I have never had a problem because I save the receipts. What’s so hard about that?
I also don’t have to balance a checkbook or worry someone is going to use my checks or wonder where they are.
Remember, I only use the money orders for things I can’t use a debit card for the very rare opportunities to buy something I can’t buy locally.
For purchase over five hundred dollars, I use a bank certified check.
Depends on the situation. I know that if you were applying for a mortgage and we needed rental verification, it would be tough to use reciepts. The reason being, anyone can fake a reciept, it's a lot harder to fake a cancelled check. Of course, you sound like someone with more than sufficient credit to not even need any conclusive proof of rent, but that's another story.