Lets cross check what the United Nation has to say about NAD: http://www.unece.org/trade/untdid/d04b/trsd/trsdnad.htm http://www.unece.org/trade/untdid/d04b/tr

Lets cross check what the United Nation has to say about NAD: http://www.unece.org/trade/untdid/d04b/trsd/trsdnad.htm http://www.unece.org/trade/untdid/d04b/trsd/trsdnad.htm As you can see, only the 3035 "PARTY FUNCTION CODE QUALIFIER", telling if this address is a buyer, a supplier, a shipper, or something else, is mandatory and everything else is conditional. You have 5 optional lines of "Name and address description", 5 optional lines of "Party name", 4 optional lines of "Street and number or post office box identifier", an optional "City Name", several optional "Country Sub-Entity Details", and optional "Postal Identification Code" and an optional "Country name code" I think that pretty flexible, allowing short addresses like "27321 Finkenburg, Germany" and long ones also. The main restriction is line length, so the address has to fit onto an envelope.