On January 8, 2021, USCIS sent a second update regarding the current lockbox delays. These delays are affecting cases going back as far as October of 2020, for which some applicants report not having received notices or even having their payments accepted.
The USCIS update states:
As a result of COVID-19 restrictions, an increase in filings, current postal service volume and other external factors, you may experience a delay of four to six weeks in receiving your receipt notice after properly filing an application or petition with a USCIS lockbox. These delays will not affect the receipt date which is determined pursuant to 8 C.F.R. 103.2(a)(7). Delays may vary among form types and lockbox locations. In some cases, you may experience significant delays if you filed a non-family based Form I-485, Application to Register Permanent Residence or Adjust Status, or Form I-765, Application for Employment Authorization, based on eligibility categories described in 8 C.F.R. 274a.12(c)(3), relating to F-1 students.
The health and safety of our workforce remains a top priority. Across all USCIS offices, including lockbox facilities, the agency has taken necessary measures such as increased social distancing and frequent cleaning in accordance with the Centers for Disease Control guidance to mitigate the spread of COVID-19. Some lockbox operations in locations that have been severely impacted by COVID-19 must adhere to stricter local guidelines.