B737-700
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 65
Situational Awareness
Deviation / Discrepancy - Procedural Hazardous Material Violation; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Overcame Equipment Problem; General Maintenance Action
Human Factors; Procedure
About 15 minutes after takeoff; we received a Dispatch message stating there was an aircraft battery loaded in the aft cargo bay in spot D1; and the Ground Agent forgot to get the Captain signature on the HAZMAT paperwork. ZZZ Ground Agent was faxing the paperwork to ZZZ1 and requested the Captain sign the paperwork on landing. Captain had a conversation with Chief Pilot and decided not to sign the paperwork after the fact. There was no notification of the battery; either verbal or written; to any member of the Crew while on the ground at ZZZ.
B737-700 First Officer reported receiving an inflight notification from Dispatch regarding an aircraft battery on board. Flight crew was not notified of the Hazmat while on the ground.