there's a late fee at my barn - I think around 30$ + if the board isn't payed by a certain date. The reason being that the owners have their own bills to be payed by a certain date as well, and without a board check they have to find an alternated source of money. No exceptions for good boarders vs. bad boarders, however I'm sure there are a few exceptions beyond that ( not sure what those are though). Even a post-dated check must include the late fee if it's past the due date. A bit annoying, yes, but it's completely understandable.
" If the entire world was one big machine, I couldn't be an extra part. I had to be here for some reason." ~ Hugo Cabret