I asked Google about paperless filing and recieved this answer
"Paperless filing of Form SSA-7162 (Foreign Enforcement Questionnaire) is not possible as it requires an original, physical signature and cannot be submitted via email or fax. You must complete and mail the form to the address provided, but you may be able to use online services through a personal My Social Security account, which can be created with an ID.me credential even if you don't have a U.S. mailing address.
Why Paperless Isn't an Option for Form SSA-7162
Requirement for Physical Signature:
The Social Security Administration (SSA) explicitly states that an original signature is necessary, and digital or electronic signatures are not accepted.
Purpose of the Form:
The form is a Foreign Enforcement Questionnaire designed to verify the address and phone number of beneficiaries living abroad and to confirm any changes in circumstances that could affect benefit payments.
Consequences of Non-Return:
Failure to return the form with your original signature can lead to the suspension of your benefits.
How to Submit Form SSA-7162
Complete the Form: Fill out the form completely using black ink or a dark pencil.
Provide an Original Signature: Sign the form in the designated signature block.
Mail the Form: Use the enclosed envelope to mail the completed form to the SSA's address.
How to Potentially Avoid Future Issues (and Handle Account Management)
Create a My Social Security Account:
If you haven't already, create a personal My Social Security account online at
www.ssa.gov/myaccount.
Use an ID.me Credential:
You can now use an ID.me credential to create an account even if you do not have a U.S. mailing address.
Explore Online Services:
Once your account is set up, you may be able to use other online services and potentially upload documents for certain situations, though Form SSA-7162 itself still requires a physical signature and mail."