Commercial Fixed Wing
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural MEL / CDL; Deviation / Discrepancy - Procedural Published Material / Policy
General None Reported / Taken
Aircraft; Human Factors; Procedure; Environment - Non Weather Related
Maintenance in ZZZ onboard aircraft prior to departure.  Maintenance applied MEL 23-XXY (Flight attendant call chimes) at gate prior to departure.  We as the crew complied with MEL operational requirements prior to leaving gate.  Once airborne; we as the crew; realized that Dispatch did not add MEL to dispatch release.  Continued enroute to ZZZ1.Cause: Running late off of gate due to maintenance in flight deck during preflight.  First Officer first trip back after 6 weeks off.Suggestion: Call Dispatch and Maintenance Control on phone when MEL being applied to aircraft.
Air carrier First Officer reported not realizing that Dispatch did not add an MEL to the dispatch release until they were airborne.