incredible value to the name trump and he could sell it. >> he didn't put in any money. he had nothing to lose. >> he would go to places with his family. with his children. don jr. and ivanka. and eric. and they would make the representations that this is a trump project. we're putting something in. >> reporter: often what they put in were themselves. >> ivanka got on stage and talked about how she purchased a unit. and she'll be frequently visiting. she mingled her way to our area and said if you need to borrow sugar. come knock on the door. >> she thought she was there as a future owner. she didn't know the appearance was required by this licensing contract. donald j. trump jr. and/or ivanka trump shall make one publicity visit. to help send the message the world's best known real estate developer was developing. each case is different.