rulie
Head Pro
As Colin has pointed out, there are no penalties for "wrong information" other than for strokes taken (including penalty strokes) in match play.He has told him it’s his ball when it wasn’t! Accidental or not it’s still wrong.
He is not going to find his ball because it’s not lost anymore .
But by taking the word of his op about the ball he’s penalised for ops mistake.
But if A knows his ball is lost he can take one of his opponents with him, ( cynical view) but proving that would be difficult.