[seszett]

Your suggestions are nice, but only if not finding the phone number in any database, or not being able to find the address when looking it up shows nothing more than a notice saying exactly that.

That should be the behaviour of all such forms, even when some seemingly important information is missing.

I can't count the amount of forms in which I had to come up with some validation-passing-yet-not-really-valid postcode so I could get my order shipped to my place with no postcode, while not giving a postcode that would get the postal service to ship to the wrong place (say, 00000 or 99999 don't work, but 10000 would indicate that I want the package shipped to Troyes, when I really want it to some overseas territory - so sometimes 11111 validates and is clearly enough not a real postcode, etc).

Also... I routinely receive packages from the US with the address printed with missing or mangled accents, sometimes just for my name, sometimes just for my city, sometimes both... come on, Unicode isn't some newfangled technology anymore, you should be able to get accents right! And these accents aren't even outside the latin1 charset.