As I finished a round at club and was moving boards I noticed a card on the floor of an adjacent table. I went over and picked up and let them know. It turned out declarer had dropped card from hand and was about halfway thru declaring hand. No one complained but thought about after that I took away the possibility that declarer may have revoked along the way. Should I have pointed out or should I had remained quiet.
Benefits include:
Plus... it's free!