On July 25, 2022, USCIS announced that it will continue accepting copies of original signatures on all forms and documents.
Signature policy is now permanent [previously it was announced in response to COVID-19 Pandemic]
USCIS will accept copies of original signatures on all benefit forms and documents, even if the form instructions require an original handwritten (“wet”) signature.
This means that you can submit a scanned, faxed, photocopied, or similarly reproduced copy of a document to USCIS as long as the copy is of an original document
containing an original handwritten signature. You must keep the original document with the wet signature and provide it to USCIS if requested.
This exception only applies to signatures. You must follow all other form instructions when completing a form.
Source: USCIS, CIS OMBUDSMAN