On-Card

From BaseballCardPedia.com

On-Card: An autographed insert card that the player actually signed, as opposed to Sticker Autographs where the player signs a sheet of stickers which are affixed to the cards at a late time. On-Card autographs are generally more highly valued by collectors, and they often also result in nicer signatures, because the athlete does not have to squeeze their autograph into a limited space.