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I have a client which is shipping via UPS, and therefore cannot deliver to Post Office boxes. I would like to be able to validate customer address fields in order to prevent them from entering addresses which include a PO box. It would be best if this were implemented as a regex so that I could use a client-side regex validation control (ASP.NET).
I realize there’s probably no way to get a 100% detection rate, I’m just looking for something that will work most of the time.
This should get you started. Test to see if the Address field matches this regex.
Translation to English: That’s a P at the beginning of the line, followed by an optional period and space, followed by an O, followed by an optional period, followed by a space, followed by ‘Box’, followed by anything else.