UDTS will accept digital/electronic signatures as long as they look like actual signatures, as opposed to a box stating something to the effect of "I certify that I agree" or something similar.
The sign-scan-send (s-s-s) method will also work, with this caveat: Signature Sheets can almost always withstand 1 round of s-s-s without issue. The second round may be fine, but after that, the chances that the Signature Sheet will warp and/or become "dirty" increase dramatically. Please use your judgment, and please be aware that UDTS will not accept a messy/unreadable signed Signature Sheet. S-s-s is usually fine for Embargo Request Forms, as only 2 people (at the most) will sign them. But, again, please use your judgment. If you have any questions, please contact UDTS Coordinator Sally Evans at firstname.lastname@example.org.