Captain reported in flight notification of release document missing required hazmat information.

Attributes
ACN	1767434
Time
Date	202010
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Daylight
Aircraft 1
Make Model Name	B737-800
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Person 1
Function	Pilot Flying Captain
Qualification	Flight Crew Multiengine Flight Crew Instrument Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 30 Flight Crew Type 13000
Events
Anomaly	Deviation - Procedural Hazardous Material Violation Deviation - Procedural Published Material / Policy

Narrative:

While at the gate pre flighting; I was informed that we were carrying an aircraft battery to ZZZ1 and was given two copies of the notice to captain (notac) to sign. At that point; I had already reviewed our release and signed it. I gave the operations agent a copy of the notac and kept one myself. While at cruise altitude; I received an ACARS message from dispatch informing me that the hazmat was not annotated in the remarks section of the release in accordance with bulletin. The dispatcher and I made a pen and ink change to the release and the dispatcher informed he would report the event.

Original NASA ASRS Text

Title: Captain reported in flight notification of Release document missing required Hazmat information.

Narrative: While at the gate pre flighting; I was informed that we were carrying an aircraft battery to ZZZ1 and was given two copies of the Notice to Captain (NOTAC) to sign. At that point; I had already reviewed our Release and signed it. I gave the Operations Agent a copy of the NOTAC and kept one myself. While at cruise altitude; I received an ACARS message from Dispatch informing me that the HAZMAT was not annotated in the remarks section of the Release in accordance with Bulletin. The Dispatcher and I made a pen and ink change to the Release and the Dispatcher informed he would report the event.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.