After I sent off my deposit and form for International Hall last week, I phoned them each of the few days afterwards to check whether they'd received it.
On hearing that they had, I asked if I would receive anything in the post.
They said no, all that remained was for me to turn up when it's time.
So I don't think they are going to be e-mailing anyone with confirmations, and, in the tradition of the whole long accommodation-giving process, will take their time to deduct our monies.