Although their tactics are limited by the Fair Debt Collections Practices Act, third-party debt collectors, those who collect a debt on behalf of another creditor are allowed to pursue these actions:
Seek payment on an expired debt
All unsecured debts, like credit cards and medical bills, have a statute of limitations. After this date, the debt is "expired" and you can't be sued for payment. But you still owe it, and debt collectors can still seek payment on these old financial obligations.
Pressure you
While debt collectors can't threaten you or mislead you, they can apply pressure to collect payment. This pressure can include daily calls, frequent letters or talk about pursuing a lawsuit for payment on the debt — as long as they stay within the bounds of the law.
Sue you for payment on a debt
Debt collectors can sue you for payment on a debt as a last-ditch effort. These lawsuits often result in wage garnishment, bank levies or both, because most debtors don't show up to court and lose by default.
Sell your debt