I'm assuming at this point that the loans were from a private lender and that you're certain that the loans were not federally guaranteed.
If you defaulted in February of 2009 and your cosigner was served with a lawsuit in May of 2013, it is likely that the lender was aware of the statute of limitations and filed the lawsuit right before the statute ran. You can verify the filing date with the court or with your cosigner.Quoting craftygal
What is the current status of the litigation?
Why has the creditor been unable to locate and serve you?
The relevant date is not when you borrowed the money, but is when you defaulted on the loans. You have suggested to us that you defaulted in February, 2009.Quoting craftygal
That may be accurate, based upon contractual late fees, penalties and attorney fees. Read your loan contract to see what you agreed to pay in the event of a default.Quoting craftygal
I would concur that the odds of their finding that offer acceptable hover around zero percent. You have the option of declaring bankruptcy, but that does nothing to protect your cosigner, whom you seem content to leave on the hook for the money.Quoting craftygal
If you believe that the amount reported is inaccurate, that would be a means by which you could seek correction.Quoting craftygal

