Enter your idea

Say I go to a supplier and make a cash purchase. I use my debit card and then walk out with goods and a receipt. Scanning the receipt to Xero and coding the purchase if easy but I am pretty slack and normally lose the receipt before I get to scan it. What say, the vendor scans a QR code that I carry containing my email/Xero info and this allows the vendor's system to email me the purchase document. No paper and I can code the purchase when I am at my PC later in the day. Also means I am more likely to remember to charge the client if it is an item for a specific job. There will be other ways to do this without the need for a paper receipt from a cash purchase, this is just how I imagine it working.