Are you referring to your hunter safety card? I know when I went last year I took an old elk tag that had my hunter safety number on it and it wouldn't work. They had to pull up a copy of it online. But they said if you visit some sort of ranger station they can permanently attach it to your profile so you no longer have to have a copy of it.
Non-res hunting bro states that a Hunter's Education Card must be carried afield at all times. My MN drivers license has my hunters ed/firearm safety endorsement listed. Is this all I then need or do I need to actual paper card from my Hunter's Ed/Firearm safety class?
What Colberjs is referring to is if you take your hunter's safety card or endorsement into a CPW office, they can verify your H.E. in the license system and you will never have carry it with you again.