810 ILCS 5/3-401

    (810 ILCS 5/3-401) (from Ch. 26, par. 3-401)
    (Text of Section before amendment by P.A. 103-1036)
    Sec. 3-401. Signature.

(a) A person is not liable on an instrument unless (i) the person
signed the instrument, or (ii) the person is represented by an agent or
representative who signed the instrument and the signature is binding on
the represented person under Section 3-402.

(b) A signature may be made (i) manually or by means of a device or
machine, and (ii) by the use of any name, including any trade or assumed
name, or by a word, mark, or symbol executed or adopted by a person
with present intention to authenticate a writing.

(Source: P.A. 87-582; 87-1135.)

(Text of Section after amendment by P.A. 103-1036)
Sec. 3-401. Signature necessary for liability on instrument.

A person is not liable on an instrument unless (i) the person signed the instrument, or (ii) the person is represented by an agent or representative who signed the instrument and the signature is binding on the represented person under Section 3-402.

(Source: P.A. 103-1036, eff. 1-1-25.)