How to write the dunning notice for private lending?

Dunning Letter * * * Company: As of March 3 1 day, the company still owes your company RMB * * * * (in words: RMB * * * *). According to the relevant contract with your company, your company should pay the above payment before * * * * *, but your company has not received the payment so far. Therefore, please pay the above amount to the company in time in the near future. This is for * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *. * * For some important customers, or customers with relatively good credit status or relatively short accounts receivable, the wording can be mild. For debts with poor credit and long aging, some tough words can be used, such as "payment is limited to * * * * days", "Our company reserves any legal means to recover the payment" and "Our company can choose to protect its own interests through relevant legal proceedings when appropriate".