​Registration and Consent to Efiling by Respondents Within 20 days of being served the notification of docket number (22 NYCRR 1245.4)
 
Within 20 days of being served the notification of docket number respondents must register and enter their contact information. 1245.3(d)
During this time, service of documents by, and service upon, parties who have not yet entered such information must be in hard copy. 
(a) All authorized e-filers who have entered information for a particular cause as set forth in 22 NYCRR 1245.3 (a), (c) or (d) or 22 NYCRR 1245.4 (d) must thereafter e-file and be served electronically in that matter.
(b) Prior to the expiration of the 20-day period for entry of information described in 22 NYCRR 1245.3 (d), filing and service of documents by, and service upon, parties who have not entered such information must be in hard copy.
(c) Upon expiration of the 20-day period for entry of information described in section 22 NYCRR 1245.3 (d), service and filing by and upon all parties other than exempt attorneys and exempt litigants must be by e-filing. Thereafter, an attorney who has neither entered information nor given notice as an exempt attorney pursuant to section 22 NYCRR 1245.4 (a) (2) shall be deemed served with any e-filed document.
(d) At all times, service by and upon, and filing by, exempt attorneys and exempt litigants shall be in hard copy. E-filers must e-file proof of any service made in hard copy.
(e) Site Instructions. Technical instructions for e-filing documents shall be set forth on the NYSCEF site (www.nycourts.gov/efile).
(f) Formatting. In addition to compliance with the court’s general rules for document formatting, e-filed documents filed pursuant to 22 NYCRR 1245 must  comply with the formatting requirements set forth in attachment A.
Fourth Department Rule
For Case Types Designated as Voluntary / Consensual:
After commencement of an action wherein e-filing is authorized, documents may be electronically filed and served, but only by, and electronic service shall be made only upon, a party or parties who have consented thereto. A party who has not consented to participation shall file documents with the court, and serve and be served with documents, in hard copy as if exempt (see 22 NYCRR 1245.4). When an e-filing party serves a document in hard copy on a non-participating party, the document served shall bear full signatures of all signatories and proof of such service shall be filed electronically. A party's failure to consent to participation in electronic filing and service shall not bar any other party to the action from filing documents electronically or serving documents upon any other party who has consented to participation.