Flight Crew Instrument; Flight Crew Multiengine
Time Pressure; Workload
Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural Hazardous Material Violation
Flight Crew Overcame Equipment Problem
Human Factors
It was my first time loading Hazmat other than dry ice. I received 4 boxes of category 3 flammable gas. I pulled out the Hazmat binder and filled out the form. I called the safety hotline to ensure I filled it out correctly but no one answered. I called Operations and Name answered. I sent him pictures of the form I completed and shipping papers. He verified that the paperwork was correct. I however did not realize I needed to attach copies of the red shipping papers to the form. It was been one year since training when I learned about Hazmat. Being a First Officer in the charter department; I never dealt with Hazmat. I should have reviewed the Hazmat process before I was released to the line as a Captain. I have reviewed the procedures and am aware of the proper procedures. I became aware when I was submitting the form on the pm side. I saw another Captain stapling the shipping papers to the form. I notified Dispatch of the situation. [The cause of the event was] my flight was an overflow from another aircraft so loading started last minute so there was a rush to get my airplane loaded. I should have slowed down to make sure I submitted the paperwork correctly. [I] communicated with Dispatch [regarding the event]. [I suggest] recurrent [training] of Hazmat.
C-99 Captain reported incomplete submission of required Hazmat documents.