If the statute of limitations has expired, the collector can't make you pay. Collectors (and the original creditor) are barred from using forced-payment options like judgments, liens or garnishments.
In addition, seven years after you went into default, the debt has to come off your credit report -- even if it's sold to collectors. No matter who owns it or when they bought it, it can't be listed on your history or used to compute your credit score.
In most states, debts can stay on your credit report longer than collectors can force collection. So a debt listed on your credit history doesn't automatically mean that the collector can compel you to pay it.
Some collectors will try to trick consumers into reaffirming expired debt, which restarts the forced-collection clock. Some reaffirmations include: acknowledging the debt verbally or in writing, making an arrangement or making any payment.
"Consumers should be careful that they don't unintentionally reaffirm a debt," says Samter. "That starts the whole ball rolling again."
The statute of limitations varies depending on the state and the type of debt. To check the rules in your state, contact the state consumer affairs or attorney general's office.


Read more: 8 tips to show if debt collector is legit http://www.bankrate.com/finance/debt/8-tips-t ... x#ixzz1LcOoAUaX

someone keeps calling from this number leaving a recorded message saying that i am a person of interest in an on going case, then it says a name that is not mine that they are intending to get in touch with.

This is a legitimate collection company.  I dealt with them once.  I'd call them if I were you.