In most cases, the parent is
not legally responsible for a 19-year-old's college education loan if the child moves out. The loan is typically in the 19-year-old's name, making them solely responsible for repayment. Parents might have co-signed the loan, in which case they *would* be responsible. However, even if they did co-sign, their responsibility wouldn't change simply because the child moved out; it remains throughout the loan's term.
The key factor determining responsibility is whether the parent co-signed the loan application. If they did not, the responsibility rests solely with the 19-year-old student.