Gentlemen ___________________

Our contract entered into on __________ (date) specifies that we will deliver _______________________ (specify goods).

We regret to inform you that the goods herein referred to are unavailable because ______________________________________________________ (set forth reason). .

We are hereby requesting your authorization to substitute the following product in lieu of the one we cannot obtain. If you are agreeable to this, would you please acknowledge your acceptance by letter.

We will look forward to your response.