NA usually refers to Narcotics Anonymous. There is no Narcissists Anonymous, since they do not recognize a problem and generally feel no need to change.
In Alcoholics Anonymous the 3rd tradition states that any two or three alcoholics gathered together for sobriety may call themselves an A.A. group,provided that as a group,they have no other...
Since there are no laws broken there are no criminal or civil penalties. It would be a broken promise/agreement between you and the private organization.