(A) “Incomplete instrument” means a signed writing, whether or not issued by the signer, the contents of which show at the time of signing that it is incomplete but that the signer intended it to be completed by the addition of words or numbers.

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(B) Subject to division (C) of this section, if an incomplete instrument is an instrument under section 1303.03 of the Revised Code, it may be enforced according to its terms if it is not completed or according to its terms as augmented by completion. If an incomplete instrument is not an instrument under section 1303.03 of the Revised Code, but, after completion, the requirements of section 1303.03 of the Revised Code are met, the instrument may be enforced according to its terms as augmented by completion.

(C) If words or numbers are added to an incomplete instrument without authority of the signer, there is an alteration of the incomplete instrument under section 1303.50 of the Revised Code.

(D) The burden of establishing that words or numbers were added to an incomplete instrument without authority of the signer is on the person asserting the lack of authority.