I called them up the very next day of my interview with them to cancel and they did not mention anything about sending them a certified letter. (datingsitesreviews.com)
Be aware that you will be tired and more susceptible than usual after a long day of interviews, presentations, and exercises, so I'd stick to orange juice! (sciencemag.org)
I started this one with a flash of inspiration that came as I reached the second day of my interviews at the 2017 edition of E3. (kotaku.com)