The dispute over online loan arrears can be entrusted to a lawyer. The parties can sign an entrustment contract with the lawyer. The trustor can specially entrust the trustee to handle one or more affairs, or can generally entrust the trustee to handle all affairs.
 Legal basis
 Article 925 of the Civil Code of the People's Republic of China
 If the agent enters into a contract with a third person in its own name and within the scope of authorization of the principal, and the third person is aware of the agency relationship between the agent and the principal at the time of entering into the contract, the contract directly binds the principal and the third person; However, unless there is exact evidence to prove that the contract only binds the trustee and the third party.

 Article 920 of the Civil Code of the People's Republic of China
 The trustor may specially entrust the agent to handle one or more affairs, or may generally entrust the agent to handle all affairs.