With direct deposit how do you get the remaining part of your payroll check after the debt has been paid?

It depends on who is doing the depositing/withdrawing. If the person/company owed money set up the direct payment from your payroll check, it should automatically stop when the debt has been paid. However, if you set up the direct deposit, it will continue to go through to them until you stop it by re-doing your direct deposit through your employer. Usually it's a form you fill out that lists the accounts your check goes into and the amounts - you would just submit a new one and it could take up to two (usually) pay periods to go into effect. And then the company you owed money to should cut you a check for the overage when you contact them.