Due to COVID-19, USCIS will accept benefit forms and documents without an original, wet signature for submissions dated after March 21, 2020, but with no announced end date. This means the document can be scanned, faxed, or photocopied from an original signature. USCIS notes that the documents with the original signatures must be retained if USCIS wishes to request it for adjudication.
See the alert USCIS Announces Flexibility in Submitting Required Signatures During COVID-19 National Emergency.