Restaurants using Yumpingo have the facility to send receipts by email. If you receive an e-receipt that you do not recall requesting, presumably the diner misspelt their own email address when they asked for their e-receipt, so you received it in error.
If you've received a receipt that is not for you please forward the email with the receipt to Yumpingo support. We will remove your email address from our system and you will receive no further communication from us or the restaurant.
If you have questions or comments please reach out by clicking the support chat box on the lower right side of your screen.