I have payment protocols for the open web on the brain and ran across a protocol based on texting: Paypal’s Text To Give system.
Text the donation code to the number shown. We’ll call or text you back to confirm the donation.
Here’s another one, this time specialized for tickets: txt2buy.
To buy a ticket; txt the event name to 60300 and you will receive a txt confirming the details and cost of the ticket.
You must reply to this txt with your 3 digit security code (the last 3 digits on the back of your registered debit/credit card) to pay for the ticket(s).
We then send you an entrance code by txt and email. Show your txt at the door and jump the queue.