DAF YOMI BABA METZIA DAF 77 Choshen Mishpat Through the Lens of The Daf YOMI-CAMP REGISTRATION 2

Q:You commit to send your son to your neighbor backyard camp but then you find out your sister has a backyard camp you know your sister and the camp will be good for your son but you only heard that your neighbor backyard camp is good can you back out of your kinian and you signed a registration form is this kinian shtar and you paid registration fee is this kinian kesef and your neighbor when it gets very close to camp puts in work for your kid is that a kinian which then you would be required to pay

A:A registration form is not a kinian shtar a registration fee is not a kinian kesef but when your neighbor when it gets very close to camp put in work for your kid that is a kinian and you need to pay her poal batul(a little less)