755 ILCS 6/5-10: Revocation.

(a) An electronic will may be revoked in the following ways:

(1) execution of a later will declaring the revocation;

(2) execution of a later will to the extent that it is inconsistent with the prior will; or

(3) execution of a written instrument by the testator declaring the revocation.

(b) If there is evidence that a testator signed an electronic will and neither an electronic will nor a certified paper copy of the electronic will can be located after a testator's death, there is a presumption that the testator revoked the electronic will even if no instrument or later will revoking the electronic will can be located.