When you need to apostille a North Dakota marriage certificate, you will need to make sure to have a certified copy of the vital record beforehand. If you need to order one, your best bet is to go through the North Dakota Department of Health. Here's what their website says about obtaining one:
They allow you to order by secure web app or order by regular U.S. mail.
Apostille for North Dakota Marriage Certificate
There is no margin for error with the Authentication or Apostille process. If mistakes are made, both your time and money will be wasted and you'll have to start all over again. If you want to look into outsourcing this part of preparing to studying abroad to someone with experience, please email me at firstname.lastname@example.org or call 848-467-7740 to request my services or learn more.