“The seven-day period during which you may cancel this contract for any reason by mailing or delivering written notice to the invention developer will expire on (Last date to mail or deliver notice)
If you choose to mail your notice, it must be placed in the United States mail properly addressed first class postage prepaid and postmarked before twelve o'clock midnight (12:00) of this date. If you choose to deliver your notice to the invention developer directly, it must be delivered to that party by the end of that party's normal business day on this date. The invention developer also has the right to cancel this contract by notice similarly mailed or delivered.”