B737 flight crew reported receiving an amended release from dispatch during the takeoff roll.

Attributes
ACN	1512463
Time
Date	201801
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Night
Aircraft 1
Make Model Name	B737-700
Operating Under FAR Part	Part 121
Flight Phase	Takeoff
Flight Plan	IFR
Person 1
Function	Pilot Flying First Officer
Qualification	Flight Crew Instrument Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 267
Person 2
Function	Captain Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine Flight Crew Instrument
Events
Anomaly	Deviation - Procedural Published Material / Policy

Narrative:

Operations and dispatch tried to contact us while on takeoff roll. Once airborne we found out the release had changed. During preflight and before push checklist our release and numbers all matched. As far as we knew we had a valid release.

Original NASA ASRS Text

Title: B737 flight crew reported receiving an amended release from Dispatch during the takeoff roll.

Narrative: Operations and Dispatch tried to contact us while on takeoff roll. Once airborne we found out the Release had changed. During preflight and Before Push Checklist our Release and numbers all matched. As far as we knew we had a valid Release.

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.