ATF Form 3310.4 must be completed in triplicate (3 copies). The original is sent to ATF’s National Tracing Center by fax at 1-877-283-0288 or by mail to P.O. Box 0279, Kearneysville, West Virginia 25430-0279. A copy is to be sent to the designated State police or the local law enforcement agency in the jurisdiction where the sale took place. The remaining copy is to be retained in the records of the dealer and held for not less than 5 years.
[27 CFR 478.126a and 478.129]