B757 Undifferentiated or Other Model
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Time Pressure; Workload
Deviation / Discrepancy - Procedural Hazardous Material Violation; Deviation / Discrepancy - Procedural Published Material / Policy
General None Reported / Taken
Human Factors
After completion of loading; ZZZ ramp personnel entered flight deck with required paperwork; [Dangerous Goods Form] and weight and balance.  They handed me the two clipboards with the paperwork that needed to be signed.  After signing the [Dangerous Goods Form] and weight and balance; I took a copy of the WEIGHT and BALANCE and gave them both copies of the [Dangerous Goods Form]; presuming one copy would be placed into the Hazmat pouch at entry door.  We departed for ZZZ1 and found that no copies were left onboard the aircraft when we reached ZZZ1.  In retrospect it is ultimately my responsibility to make sure all required paperwork is onboard prior to departure. I didn't catch the fact that ZZZ had taken both [Dangerous Goods Form] copies.
After Weight and Balance was completed in ZZZ the Captain handed the load supervisor the [Dangerous Goods Form] and release. When we landed in ZZZ1 there was no [Dangerous Goods Form] in the folder and it became apparent the load supervisor had kept both copies. We advised ZZZ1 the problem and they immediately called ZZZ. Ultimately we should have supervised her placing it in the folder but we did not.
B757 flight crew reported on arrival at destination that the required Captain's Dangerous Goods Form copy inadvertently left behind at departure airport.