If the translation is correct, an assignment or pledge is an irrevocable pre-dispute grant of a property interest in future wages, and such an arrangement will not honored by the employer in the absence of a specific exception to the general rule of law prohibiting such arrangements (these arrangements are functionally equivalent to indentured servitude which is just a short step removed from slavery).
An assignment is an irrevocable transfer of the right to future income that will be paid to the assignee that is a property right in that income. A pledge grants an irrevocable property right to future income to the beneficiary of the pledge in the event that a debt is not paid as agreed without the need to resort to filing a lawsuit (it is functionally equivalent to a confession of judgment paired with a garnishment).
Assignments and pledges of income from property or a business is allowed, but you can't generally do that with wage or salary income as a matter of public policy.
For example, you cannot make an irrevocable transfer of 25% of your future income for five years or until the car is paid off to pay for a new car. You can sign a promissory note to pay a certain amount of money that happens to be equal to 25% of your income, and can receive the money from your employer and pay it to the creditor. But, that is a contract right and not a property right, which means that you can unilaterally breach it subject to being sued for non-payment, that the contract debt will not survive a bankruptcy, and that a lawsuit has to be commenced and won to collect that debt involuntarily. If the car loan is not paid as agreed, and you don't go bankrupt, the creditor can sue you, win and garnish your wages after winning, but only then.
But, there are exceptions to the general rule prohibiting the assignment or pledge or future wage and salary income, however, on various legal theories (e.g. that future wages and salary are community property of spouses).
For example, sometimes this kind of wage assignment is permitted in the context of a divorce settlement. And, if it is permitted by law, the company will charge you to set it up, just as it would if your wages were garnished to collect on a post-dispute judgment.