How to write letter of preparedness to pay school fees

To whom is the letter going? Asking for a scholarship?

To whom it may concern.

Regarding fee notification on XX/XX/XXXX, in the amount of $XX, expect payment on XX/XX/XXXX, no later than XX/XX/XXXX.

Thank you


<Sign Name>

It's proper to call and make arrangements for payment when you cannot make stated due date. Otherwise just send the payments ON TIME