Tie in mistakes are comon

Based on 1 500+ unique votes to, Have you made a tie in mistake?, we can see that only 43 % have never made a mistake. One good piece of advice is to never disturb the climber tieing in. You should absolutely not ask for beta or if he/she could get the chalk bag or quick draws etc. The belayer should always check the knot or ask the climber to check by saying - On belay!, before starting to climb.