If you turn on the "Enable Postal Code Validation" checkbox under Options->Countries in the admin of BV Commerce 5 a "regular expression" is used to validate the zip code data entered by your customers. By default the United States format accepts only a 5 digit zip code. This is because some shipping services will only accept a 5 digit postal code.


If you'd like to keep validation on but want to accept zip and zip+4 postal codes you will need to update the regular expression to the following:



^((\d{5}-\d{4})|(\d{9})|(\d{5}))



1) open your admin web site

2) Go to Options->Countries

3) Click "Edit" next to the "United States"

4) Change the "Postal Code Validation Regex:" value to read as follows: ^((\d{5}-\d{4})|(\d{9})|(\d{5}))

5) Click "Save Changes"

6) Make sure the "Enable Postal Code Validation" checkbox is turned on and click "Save Changes"

No. See my post above. We shipped the software to only accept 5 digits because that's what some shipping services are limited to and what most consumers will enter. I don't even know my own +4 extension and I would wager that most consumers don't either.

If you decide that you need a zip+4 system you can use the regex up above but it is unsupported. The software was not shipped this way and was not tested for things like receipt display of zip+4.