It isn’t advisable to leave staples in receipts when preparing to get them scanned. Removing staples from the receipt will help the receipt lie flat against the scanner's surface. Additionally, if you’re preparing to send your receipts in a Magic Envelope to Shoeboxed, here’s what our support team says about how to prepare your receipts for scanning: Please make sure that documents are not attached to larger pieces of paper, as we are not able to process this kind of document. Each receipt should be loose in the envelope. Each individual document should also not be stapled or otherwise attached to other pages unless the document is part of a multi-page document. You can read more about multi-page documents here.