re: Anybody else using their HSA as a retirement vehicle?

I have had an HSA for several years, but didn't learn about using it for retirement purposes until after having kids. I struggle enough as it is to stay organized now-a-days. I just spend my HSA on medical expenses as they come up instead of going through the trouble of logging the receipts and reimbursing later.

I've asked this before, but what's stopping people from reimbursing themselves for the same medical expense year after year? Do you have to send in a copy of your receipt for reimbursement?