Because it is voluntary, it is different from a garnishment. Since your employer's accounting department must make the deduction and send it to the creditor, talk to your employer first to see if this arrangement is acceptable. Some employers refuse to handle voluntary wage assignments because it complicates their payroll procedure. If acceptable to your employer, the voluntary wage assignment is better than a garnishment. In the eyes of the employer, you are taking the responsibility of arranging to meet your obligations, rather than being forced to pay your debts.
Some employers find reasons to suspend or fire employees if their wages are garnished.
Sometimes a creditor will refuse to believe your promises of payment. This often happens if you have been unable to keep up with a previous payment agreement. In that case, creditors might be persuaded to accept a new repayment plan if you offer to include a penalty clause in the agreement. Such a provision states that if you default in making any of the agreed-upon payments, you owe the creditor an amount of money in addition to the original debt. Offering to include such a penalty clause demonstrates your honest intent to pay.