On a similar note, if you ever need to provide a (US) number for a discount and they don't verify it (like at grocery stores) you can almost always just use a 5

On a similar note, if you ever need to provide a (US) number for a discount and they don't verify it (like at grocery stores) you can almost always just use a 555 number [1] in the format: XXX-555-01XX These are designated as "fake" numbers and are used in TV and film when they need to show a number on screen but don't want to open up some random person to prank calls. Also, these numbers are almost always going to already be registered in a rewards program: XXX-555-5555 555-555-5555 XXX-867-5309 [1] https://en.wikipedia.org/wiki/555_(telephone_number) https://en.wikipedia.org/wiki/555_(telephone_number)