Glad you asked...
To write a postponement letter, you should set up your page in an appropriate format, such as MLA style. List your name, date, and the reason for the postponement. Also, list the date in which you want to reschedule the occasion. Sample postponement letter http://www.cnblogs.com/DesignPatterns/ar...
Then again, this answer might help you...
A professional letter of postponement simply states that for unforeseen events, the previously scheduled event will have to be deferred. Short, clear, and succinct will do it.

