The transferor/sender federal firearms licensee (FFL) of the stolen or missing firearm must report the theft or loss to ATF and to the appropriate local authorities within 48 hours after the transferor/sender FFL discovers the theft or loss of a firearm.
The transferor/sender FFL must also create a disposition entry reflecting the theft or loss of the firearm in the required bound book not later than 7 days following discovery of the theft or loss. If the firearm is later recovered, the transferor/sender must re-enter the recovered firearm as an acquisition or disposition as appropriate.