Commercial Fixed Wing
Flight Crew Instrument; Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 2.6; Flight Crew Total 549.03; Flight Crew Type 549.03
Distraction; Training / Qualification
Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural Published Material / Policy
General None Reported / Taken
Human Factors; Environment - Non Weather Related; Procedure
Flight operated normally.  After landing in ZZZZ and beginning flight planning for next leg I realized I had not signed the release prior to departure for the previous flight. I had just returned to the line after not flying for almost 7 months due to the pandemic. We were on a delay due to flight attendant staffing.  I reviewed the release; saved it to my iPad; briefed my crew and even spoke with the Dispatcher prior to departure about the Flight Attendant issue and our timeline for departure. However I missed signing the release. Contributing factors include; lack of recent experience due to the pandemic; inability to print the dispatch release displayed on the ACARS.
Air carrier Captain reported not signing the flight release prior to departure.