Holland

700 S. Waverly Rd.
Holland, MI 49423

(866) 465-5263 Pickups/Tracing
(616) 395-5000 Phone
Email Sales

Our Service Coverage

  • Headquarters in Holland, Mich.
  • Central United States and Canada

PRO NUMBER CHECK-DIGIT CALCULATION

How do I calculate a Check-Digit for my Holland Pro?

 

Click HereĀ for Check-Digit Calculation Instructions and Examples (pdf)

Click HereĀ for Check-Digit Instructions and Validation Spreadsheet Tool (xls)