In February 2020, the DD Form 441, Department of Defense Security Agreement and DD Form 441-1, Appendage to Department of Defense Security Agreement were renewed and now include the use of digital signature. Previously executed versions of this form do not need to be re-signed, but the updated version should be used going forward as of this date. The updated forms can be found here:
DD Form 441
DD Form 441-1
Questions can be directed to your assigned Industrial Security Representative.