here is what i found
Appendix 10-9 Standard Timeframes for Applicants or Petitioners to Respond for Requests for Evidence (RFE) [Appendix effective June 18, 2007]
In compliance with 8 CFR 103.2(b)(8) , (11) , and (13) the guidelines below provide general timeframes for applicants or petitioners to respond to RFEs. The maximum response time for an RFE remains 12 weeks. These guidelines set forth examples of the circumstances when USCIS will, in the exercise of its discretion, issue an RFE for a period of fewer than 84 days. In any case where the RFE is issued by mail, the applicant or petitioner will receive three additional days, as provided at 8 CFR 103.5(b) .
Is that means any case ask for like I-757 RFE will received 3 more days if mail it??!!
because i mailed my thing on the deadline date!