sample of letter complaining to a customer about a delayed payment?

Question

business letter of complaint

Answer 1

Dear John Smith,

We have not received payment in the past 30 days, and regretfully your account has been scheduled to be turned over to collections.

Please help us avoid legal actions against you. Contact us with a payment schedule promptly that is mutually acceptable.

Thank you for your past and hopefully future partnership,

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Answer 2

if this is a company that you been working for i think they have there on complained letter for the customer. but the best thing is that review every transaction that your customer did and make a waiver and if possible add additional charges so the client or the customer know what to do, the more he dont pay the more he will pay