Small Aircraft
Flight Crew Commercial; Flight Crew Flight Instructor; Flight Crew Multiengine; Flight Crew Instrument
Confusion; Fatigue; Distraction
Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural FAR
General None Reported / Taken
Environment - Non Weather Related; Procedure; Human Factors
During all this COVID restrictions fatigue is taking its toll. At ZZZ I called Center and picked up clearance and departed to ZZZ1 like usual. After departure I had doubts about being released or not. Every night it is pick up the clearance with a fast issuance concluded with void in 5. During all this I will correct any doubts about being released by making sure there is verbal confirmation or denial of 'you are released' or 'hold for release'. It would be an improvement in safety to require a verbalization of release on every clearance at uncontrolled fields as this one was at the time.
Pilot reported being unsure if he had a release to get airborne on a flight.  Fatigue from COVID-19 restrictions was cited as a contributing factor.