On Nov. 1, 2021, the Student and Exchange Visitor Program (SEVP) published SEVP Policy Guidance: Use of Electronic Signatures and Transmission for the Form I-20, which establishes the procedures for the use of electronic signatures and transmission of the Form I-20, “Certificate of Eligibility for Nonimmigrant Students.” This guidance permits designated school officials (DSOs) to electronically sign and transmit the Form I-20 to initial and continuing students and their dependents.
Under this guidance, DSOs may electronically sign all signature fields on the Form I-20 using software programs or applications, or by using electronically reproduced copies of a personal signature. Additionally, school officials may scan and email or electronically transmit the Form I-20 via secure platform, such as a school portal or other secure site, to F and M students and their dependents. DSOs may also choose to still physically sign and mail the Form I-20 to students.
link here: https://www.ice.gov/doclib/sevis/pdf/I20-guidance.pdf