If a customer mistakenly opts out of receiving text receipts or chooses to opt back in, they can simply text unstop from the last text receipt message they received. I tested this myself on my demo account:
Keep that in mind: As you can see in the last message, I'm told to try my Start request later since I opted back in immediately after I opted out. Give it a couple shakes before sending unstop again.
If the customer lost the original text receipt from their messages and can't reply unstop, suggest they visit profile.squareup.com to update their communication preferences and add their phone number, email or another card if they wish. Here's the landing page:
cc: @dasap1234 I hope this helps!
