Commercial Fixed Wing
Communication Breakdown
Deviation / Discrepancy - Procedural Published Material / Policy; Flight Deck / Cabin / Aircraft Event Other / Unknown
General None Reported / Taken
Company Policy; Human Factors
During boarding the agent came to the plane to take care of something.  Our D FA; told the agent that she could seat a non rev in [seat] XX if she wished to. The agent confirmed with D FA it would be okay. They assigned XX to a non rev. After door closure our B FA; advised myself and the D that we aren't allowed to have a passenger in XX. D FA told us that she was fine with it and that she had given the agents permission to assign the non rev there. B FA told her that it wasn't okay because it was against current policy for social distance. D FA advised that she didn't care and that she does it all the time because she likes to take care of the non revs. B FA told her it wasn't okay but D FA didn't care. We left ZZZ and during the middle of the flight when we had a moment to speak together as a crew I told them that I wasn't comfortable with this violation of the policy and I was going to [report] the situation. There were plenty of available main cabin seats to assign to the non rev.All FA's and CSA's should understand that we do not have the authority to override safety policies and procedures needlessly.
Flight Attendant reported that another Flight Attendant assigned a non-rev to a seat that was against current policy for social distancing.