Del. Code Ann. tit. 29, § 5402
(a) Any authorized officer, after filing with the Secretary of State a manual signature certified by the authorized officer under oath, may execute or cause to be executed with a facsimile signature in lieu of a manual signature:
29 Del. C. 1953, § 5802; 58 Del. Laws, c. 57; 70 Del. Laws, c. 186, § 1