On April 27, 2006, USCIS issued a Public Notice providing details about its delay in issuing and mailing receipt notices for Forms I-129 and I-140 filed in early April 2006. Citing an "unusually large volume of receipts" at the Service Centers during the first week of April, USCIS explained that it is taking longer than expected to enter cases into the system. Depending on the type of case, it may take USCIS up to two weeks to generate and mail receipt notices. USCIS promised that, although the "Notice Date" will reflect the date the receipt notice was actually generated, the original receipt date will be honored and recorded on the receipt notice under "Received Date." USCIS also stated that it is addressing the problem and expects to be current by mid-May.