If it gets turned down, you can try talking to customer service for alternatives or see if they’ll accept other proof, like bank statements or emails.
Yes, usually you should do this soon after realizing your receipt is missing. Different businesses may have varying timeframes, but it's good to act promptly.
It's a statement you make to claim that you've lost or can't find your receipt. This allows you to still get some services or refunds even if you don't have the physical document.