Legally speaking you are liable. For instance in Virginia it is illegal to cook food and take it to your neighbor but you can invite him to eat but not transport it to his house. That was told to me by the health inspector. That said the health inspector said they had never heard of anyone charge for this. All in all I think that you are good and would never have a problem provided you are dealing with friends and family.
FEC 120, Lang 84, Custom Off Set