Yes. You can forward receipts to your unique 1tap email-in address, and 1tap processes them automatically.
Set up and use email-in
To email a receipt to 1tap:
Find the receipt you want to send.
Forward it to your 1tap email-in address. To find your address, open the app, go to Settings, then Email-in, and tap Activate. 1tap sends you your unique address.
Select Send.
Tip: Send one receipt per attachment. Don't send multiple receipts in a single attachment. You don't need to write a message in the email body.
Once you send the email, 1tap's team processes it. The receipt appears in the Processing tab, the same way it would if you'd taken a photo of it. Once it's processed, it appears in your Recent tab.