-- Posted by Anonymous at 3:38 pm on Aug. 28, 2008 Say I applied for a loan and asked that someone co-sign for me, to what extreme would their participation in the loan payment be? Are they sent bills as well? I'm not sure what they're exact necessity is. So if someone here could explain this out to me I'd appreciate it LOADS. Thanks for those of you that try or do. -- Posted by BeautifulLies82 at 3:39 pm on Aug. 28, 2008 If you don't pay, then the loan company will come after them. -- Posted by pujolsfan at 3:39 pm on Aug. 28, 2008 if you dont pay, then they get the bill -- Posted by Anonymous at 3:42 pm on Aug. 28, 2008 Sweet.  Thanks. -- Posted by blueroadrunner at 4:04 pm on Aug. 28, 2008 yea so if you don't pay the credit hounds will hunt the other person.....and bug the hell out of them! -- Posted by campusvitals at 7:26 am on Aug. 29, 2008 A co-signer is stating that if you (primary borrower) are unable or unwilling to pay them what you owe, the other person will become liable for the payments that you do not make.   As long as the primary borrower makes payments on time, the co-signer will have zero involvement in the process.  Only in default will a co-signer get called or sent a bill. Hope that helps.