Air carrier captain reported a passenger refused to comply with face mask policy.

Attributes
ACN	1767223
Time
Date	202010
Aircraft 1
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	Descent
Flight Plan	IFR
Person 1
Function	Captain
Qualification	Flight Crew Instrument Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 48 Flight Crew Total 5297 Flight Crew Type 5297
Events
Anomaly	Deviation - Procedural Published Material / Policy Flight Deck / Cabin / Aircraft Event Passenger Misconduct

Narrative:

Passenger in [seat] X1 refused to wear a mask. Dispatch was notified. [Requested] aircraft [be met] upon arrival. Landed without further incident. I initially told dispatch it was not a security threat level 1. I was in a busy part of the flight and did not have time to look it up. After landing; I reviewed the flight manual and realized it was a security threat level 1. Either way; all security threat level one procedures were followed.

Original NASA ASRS Text

Title: Air carrier Captain reported a passenger refused to comply with face mask policy.

Narrative: Passenger in [seat] X1 refused to wear a mask. Dispatch was notified. [Requested] aircraft [be met] upon arrival. Landed without further incident. I initially told Dispatch it was not a security threat level 1. I was in a busy part of the flight and did not have time to look it up. After landing; I reviewed the flight manual and realized it was a security threat level 1. Either way; all security threat level one procedures were followed.

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.