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To purchase a firearm the ATF Form 4473 is completed by the purchaser. If some information provided on ATF Form 4473 has matched with information contained in the National Crime Information Center, the Interstate Identification Index, and/or the NICS Indices the response can be an immediate deny or a delay. The Privacy Act of 1974 restricts the ATF or FBI to supply specific information to you via the telephone on what was matched to trigger the delay, or denial.