A trust or a business entity (LLC, Corporation, Partnership, etc.) can own and hold property. These entities are able to buy and sell property, but the entity does not sign on the sale agreements. The Revocable Living Trust, LLC, and Corporation are all abstract entities; they only exist on paper and do not exist in the real world. Nonetheless, these abstract legal entities frequently interact with the real world and generally authorize a real, live human-being to handle the physical elements of the entity’s existence.
When a Trust is selling property, the Trust does not sign the documents; rather, the Trust oftentimes has a “Trustee” who is the person charged with administering the acts of the trust. The Trustee is the “legal owner” of the trust’s assets [they “hold the assets in trust”], and the Trustee will only act as directed in the Trust documents. If the Trustee determines that selling real property held in the Trust, and determines that the trust documents permit the sale, it is the Trustee who actually sells the property and signs the paperwork, not the Trust.
When signing on the “Seller Signature Line” the Trustee should write “John Doe, Trustee of the Doe Family Revocable Living Trust.” They should not sign the document as simply “Doe Family Living Trust.” If the Trustee is signing as a Trustee, they need to make it clear that they are not signing as themselves individually [e.g. signing as “John Doe” without any reference to his title], but rather are signing the sale documents in their capacity as Trustee.
The same is true for businesses. The signature should not be “ABC, LLC” it should be “John Doe, Manager of ABC, LLC,” thereby indicating that it is the person signing is a manager with signatory authority (being a “signatory authority” means you are authorized to sign documents for the business). If the LLC is member-managed, the person would sign as “John Doe, Member of ABC, LLC,” or in a similar way identifying the person’s signatory authority within the business.