A trustee service is a service provided by a professional or a company that acts as a trustee on behalf of another person or entity. A trustee is a legal entity or individual who is appointed to manage assets or property for the benefit of another person or entity.

A trustee can manage a range of assets, including cash, investments, real estate, and other valuable property. The trustee is responsible for ensuring that the assets are managed in the best interests of the beneficiary, in accordance with the terms of the trust agreement.