What would NOT be considered a signature?

A mere mark on the document would not be considered a valid signature because it lacks the necessary attributes that characterize a signature. Signatures are typically intended to represent the intentions of an individual and should convey their identity clearly. A mere mark does not fulfill this requirement, as it may lack clarity, representation, or intent.

In contrast, an electronic signature, a printed name in block letters, and a handwritten signature all serve to signify an individual’s consent or acknowledgment of a document. Electronic signatures are legally recognized in many jurisdictions, including Illinois, and can be used effectively for various documents. A printed name is often used as a shorthand form of a signature, especially in business settings, and still carries the individual's endorsement. A handwritten signature, the most traditional form, clearly indicates personal endorsement. Therefore, while these forms of signing have different characteristics and applications, they all fulfill the criteria of what can be considered a signature, unlike a mere mark, which does not convey the necessary intent or identity.