Is it permissible to hire a man to collect a debt through coercion in exchange for a fee he takes from the debtor, or in exchange for a fee deducted from the creditor's money?

It is permissible for the right-holder to seek assistance from someone who can recover his money from a procrastinating, non-impoverished debtor, provided that this does not lead to an evil act such as beating or threatening. The general rule is that seeking assistance from a thug is forbidden if it will result in an evil act, but if one is confident that it will not result in an evil act, then it is permissible. It is also permissible to seek assistance from dignitaries. The rich person's procrastination permits complaining about him, speaking of his injustice, and imprisoning him. Furthermore, it is permissible to pay a fee to someone who recovers the money, whether it is a percentage or a fixed amount. It is also permissible to oblige the procrastinator to pay what the right-holder incurred to obtain his right, provided that the expense is customary.