listed in the signature block?); the intention of the parties (if the contract language is ambiguous, did the parties intend to bind the entity?); and whether the person signing the agreement has authority to bind the entity. In some cases, this last factor may turn out to be the most important because if the signing party cannot bind the entity, the entity usually won't have any obligations under the agreement.
Who has authority? To bind the entity, the signing party must have authority (or apparent authority). If you have doubts about whether someone has authority to sign an agreement, you should require evidence of that authority, usually in the form of a corporate resolution or similar documentation.Occasionally, language may be included in an agreement that states something like, "I have authority to sign this agreement." Alas, including that language does not bind the entity. At best, it allows you to sue the signing individual for misrepresentation.