ATF Form 3310.4, Report of Multiple Sale or Other Disposition of Pistols and Revolvers - also known as the ATF E-Form 3310.4 - is a form that has to be filled out by a firearms dealer if they sold two or more firearms to one person within 5 consecutive business days.
The most recent version of the form was issued by the Bureau of Alcohol, Tobacco, Firearms, and Explosives (ATF) in April 2019. A fillable ATF Form 3310.4 is available for download below.
This form must be prepared in three copies and submitted no later than at the end of the business day when the multiple sales took place. The first copy is submitted to the ATF via email to: firstname.lastname@example.org, faxed to 1-877-283-0288, or mailed to the following address: Department of Justice Bureau of Alcohol, Tobacco, Firearms, and Explosives, National Tracing Center, 244 Needy Road Martinsburg, WV 25405.
The second copy is forwarded to the Chief Local Law Enforcement Official (CLEO). A local chief of police, sheriff of the county, head of the State police, or State or local district attorney or prosecutor can be considered a CLEO. The third copy is retained by the dealer.