Dear :

We would like to remind you once more that your account for $ is more than months past due.

You have been our valued customer for many years, and your good credit rating has enabled you to purchase from us on convenient payment terms at a substantial discount. However, to keep your good credit rating and continue receiving the benefits, prompt payment of your account is necessary. For customers with good credit rating, we are willing to make flexible arrangements for staged payment, but we can't allow this account to continue to go unpaid.

Could you take a moment right now to pay your account? If this is not feasible, please call me today to settle an arrangement.

Sincerely yours,

[name]

[title]