a undonate should be allowed if the tourney has not started.
it should be allowed if that person is on bye and is able tp participate in the tourney.
in other words. that person was trying to help you, your league, and the players get a tourney off. remember the concept is to have fun.
and in consideration, if that person can come and play in their own donated place, i myself will allow it as long as it is typed in the em before their match is to start. therefore meaning, they must be in the room present, and there will be no timer. if they are not present, i will have to type in the em, player a. is not in the lobby. player b. advances.
on the via im donates. i have had plenty that donated and forget to type in the em that they donated before closing their page. i am in charge of my tourney. plain and simple, i type in the em, player a. donates per im request. and click their loss when appropiate.
communication is the best for any situation. and agreements saves trouble!