Dear :

Your bill # for $ has been received. I am enclosing a check for $ toward the balance of our account. I am sorry that we are not able to pay the total sum immediately, because we are having some temporary financial problems and are forced to pay the remaining $ next month. But I promise that we will settle our account before [date].

I hope you will understand our situation. Please let me know whether this arrangement is acceptable.

Sincerely yours,

[name]

[title]