Dear [Customer's Name], We hope this letter finds you well. It has come to our attention that there is an outstanding balance of [Amount Due] on your account with [Company Name]. Despite our previous attempts to remind you of this unpaid bill, we regret that it remains unresolved. As a valued customer, we deeply appreciate your support and patronage throughout the years. It is our priority to maintain a positive and mutually beneficial relationship with you. However, we must kindly request immediate payment of the outstanding balance to avoid further escalation. Please take a moment to review the enclosed invoice, which provides a detailed breakdown of the charges. The amount due is for the [Product/Service] provided on [Date]. We believe this notice may be an oversight on your part, and we sincerely hope this can be resolved without any inconvenience. To settle the outstanding balance, please make a payment within [number of days] days from the receipt of this letter. You can send the payment through any of the following methods: direct bank transfer, check, or online payment portal. If you require any further assistance or would like to discuss a possible installment plan, please do not hesitate to contact our friendly customer service team at [Customer Service Number] during business hours. We understand that unforeseen circumstances can sometimes affect our financial obligations. If you are experiencing any difficulties in making the full payment at this time, we encourage you to reach out to us as soon as possible. We are committed to exploring potential solutions to assist you in fulfilling your obligations and easing any financial burdens. Nevertheless, if we do not receive a response or receive the full payment within the designated time frame, we will be left with no choice but to pursue further action to recover the debt owed. This may involve engaging a collection agency or pursuing legal options, which can negatively impact your credit rating and result in additional costs. Our goal is to resolve this matter amicably and maintain a positive relationship with you. We sincerely hope that this notice serves as a wake-up call to address the outstanding balance promptly. Please note that failing to resolve this matter may lead to additional consequences that we would prefer to avoid. We appreciate your immediate attention to this matter and look forward to receiving your timely response. Thank you for your prompt action in settling this unpaid bill. Best regards, [Your Name] [Your Title/Position] [Company Name] [Contact Information] Alternate versions of Hawaii Sample Letter for Collection Notice for Unpaid Bill: 1. Sample Letter for Collection Notice for Unpaid Medical Bill in Hawaii. 2. Sample Letter for Collection Notice for Unpaid Utility Bill in Hawaii. 3. Sample Letter for Collection Notice for Unpaid Rent Bill in Hawaii.