My sister's husband sent me these, and I'm not sure if there is anything I can do about the creases and folds...I don't want to destroy them!
Leave the creases and folds alone . I think they would be worth buying a banknote flip that way you could put it in the flip in a way that all the creases and folds are held in place. Like the banknote flips TPGs use. Those definitely represent an extremely important part of American history and they should be preserved for future generations .
