I've text some to tell them I think it's fine to do it at the end of the day it doesn't matter how you get it over to them the price is going up if they don't want to pay more they won't,I nice neatly written note IMO will make no difference,in most cases if I have to leave a ticket I just out the new price on those,I looked back over old Diarys at the weekend and I couldn't believe how long it had been between rises I think during the recession a lot of windys just forgot about increasing prices TBH.