Narrative:

In the climb we received ACARS from dispatch asking if we had received notac from ZZZ ops. We were advised by dispatch that we should have received notac from ZZZ for company hazmat (three O2 bottles) onboard. We hadn't and were unaware that we had company hazmat onboard.

Google
 

Original NASA ASRS Text

Title: B737 Captain reported being advised during flight by Dispatch of HAZMAT on board. No HAZMAT forms provided with flight release at departure.

Narrative: In the climb we received ACARS from Dispatch asking if we had received NOTAC from ZZZ Ops. We were advised by Dispatch that we should have received NOTAC from ZZZ for Company HAZMAT (three O2 bottles) onboard. We hadn't and were unaware that we had Company HAZMAT onboard.

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.