the team has 1 black, 1 green, 1 white jersey each season and that includes the post season also. specialty jerseys are one offs and usually do not have their names on the back, that way the university can sell them right away. LOA were never given until the 02-03 season. so if you have a jersey from 02-03 till now, it should have an LOA from the University. If you do not have one with the jersey, it could devalue it a little bit as some collectors want that LOA from UND. They very well could've sold one without the neck tie lace but it all depends.
Out of curiosity, which jersey are you