Is it illegal to entrust others to collect accounts at home?

It's not illegal. It is not illegal to ask for accounts through proper means and entrust others to collect them at home. Article 535 of the General Principles of Civil Law of People's Republic of China (PRC) stipulates that if the debtor is slow to exercise his creditor's rights or subordinate rights related to the creditor's rights, which affects the realization of the creditor's due creditor's rights, the creditor may request the people's court to subrogate the debtor's rights to the counterpart in his own name, except that the rights belong exclusively to the debtor. The scope of subrogation is limited to the creditor's due creditor's rights. The necessary expenses for the creditor to exercise subrogation shall be borne by the debtor. The counterpart may claim the debtor's defense from the creditor.