i do have the two weeks accident free before underwear policy as well ....but in all honesty some kids truly do see pulls ups as glorified diapers and use them as such .....in that case i do use the thick underwear with a plastic cover over top ....i do not dump or dunk the under wear in the event of an accident and they just get rolled up and placed in a bag for the parent to deal with at home .....if the child has been using underwear and is able to tell you that he has to go to the bathroom and hold it for a few minutes beyond that announcement then i would allow the underwear. if the child is still at the point where they are not able to indicate that they have to go and then just soil them selves and then still not say anything then that is not acceptable ....if the parent is just putting the child on the potty every 30-45 minutes ..well that is not a trained child that is a trained adult ....i would say if you want to get rid of this family then then heres your chance but otherwise i would get more info on how potty training is going and offer to give it a shot and if the child just soils himself and says nothing ...even once ...then its pull ups