If you engage the services of an individual (independent contractor) in your business, other than one who meets the definition of an employee, and you pay him or her $600 or more for the calendar year, then you are required to issue that person a Form 1099-MISC to avoid penalties and the prospect of losing the deduction for his or her labor and expenses in an audit. Payments to independent contractors are referred to as non-employee compensation (NEC).
Because so many fraudulent tax returns were being filed right after e-filing opened up in January and before the old 1099-MISC due date at the end of February, the IRS had no way of verifying NEC. That opened the door for the IRS to be scammed out of millions of dollars in erroneous earned income tax credit (EITC). To plug that hole, the IRS moved the filing date for NEC 1099-MISCs to January 31 and no longer releases refunds for returns that include EITC until the NEC amounts can be verified.