Delivery Point
The USPS (United States Postal Service) assigns delivery points in addition to the zip + 4 codes as a way of designating multiple delivery points at the same address (4 offices in the same building -- or -- 2 apartments in the same house, for example). Delivery points are not typically printed (except for Canadian users in certain cases) but are included when POSTNET bar-coded mailing labels are printed. Usually, this is a single digit added to the end of the ZIP code, ZIP+4 code, or a combination of both codes when printing a barcode. Typically, a check digit is also added after the delivery point (if included). This part of the address can be up to 4-characters in length.
For Canadian users, the delivery point field has an alternate use (see below):
Settings for Canada
If your company is located in Canada (and assigned to the Canada regional parameter), the delivery point can be used to add a country notation to addresses on documents. If the delivery point is US, USA, or CAN, these is printed with most document addresses. Again, this is only done for Canadian systems (as determined by the "Canada" system parameter).