DELAYED REFUND? - Letter 4464C The IRS sends these letters out to verify identity and reduce fraud. It does not mean that you have done anything wrong. The IRS is being very diligent in trying to protect individuals and their identities. The IRS Integrity and Verification Operations IVO group is delaying a number of taxpayer refunds to screen for identity theft and refund fraud. Taxpayers identified by the program may receive a 4464C letter from the IVO stating that their tax return is being thoroughly reviewed so that the IRS can ensure the accuracy of return information. The letter states that the IRS may contact the taxpayer or third parties for further information and that if the taxpayer does not hear from the IRS or receive his or her refund within 60 days from the date of the letter, the taxpayer may contact the IRS directly. Once the IRS has completed its review, it may send a full or partial refund or no refund. Whatever the decision, the taxpayer can appeal it. The IRS has indicated that the letters are part of the screening program to combat stolen identity refund fraud and do not mean the taxpayer has been selected for audit. Both the IRS and the Department of Justice DOJ Tax Division have increased their efforts to combat stolen identity refund fraud.