NetSuite Dunning Letters Solution


Reduce DSO. Improve Cash Flow. Automate Dunning in NetSuite.

Still manually managing collections or struggling with the limitations of NetSuite’s Dunning Letters SuiteApp?

Excelym’s NetSuite Dunning Solution helps finance teams automate collection workflows, improve customer payment follow-up, and reduce the time spent managing overdue invoices.

Whether you’re a Controller, CFO, AR Manager, or NetSuite Administrator, our solution provides the flexibility and automation needed to streamline collections while maintaining a positive customer experience.

What is Dunning in NetSuite?

Dunning is the process of proactively communicating with customers regarding outstanding invoices and overdue balances.

The goal isn’t simply to send reminders—it’s to accelerate collections, improve cash flow, and reduce the administrative burden on finance teams.

NetSuite’s native Dunning Letters SuiteApp provides basic collections automation. However, many organizations find it difficult to support their real-world collections processes because of limitations around flexibility, automation, recipient management, attachments, notification schedules, and customer-specific requirements. And as businesses grow, they eventually face these challenges:

  • Limited flexibility for different customer scenarios
  • Difficulty managing multiple recipients
  • Limited support for complex organizational structures
  • Inability to easily automate advanced reminder schedules
  • Manual intervention required for many collections processes
  • Challenges managing large supporting attachments
  • Limited visibility into collections performance

When collections become more complex, finance teams need a solution built around their actual business processes—not around software limitations.

Client Testimonial

“We’ve used Excelym as a Netsuite service provider for years and have been pleased with their quality of service, timeliness of response and professionalism. Recently we had them build a custom Dunning system to meet our needs and our Collections have improved in all aging categories as a result. They are a valued partner.”

Keith Andel
Senior Vice President Global Accounting
FlashParking, Inc. | Austin, TX

User Interface of Excelym’s NetSuite Dunning Solution

The solution helps streamline dunning, improve cash flow, and reduce manual follow-up efforts—all through an intuitive and user-friendly interface.

We understand that off-the-shelf dunning solutions often fall short of addressing the unique requirements of various companies, particularly in critical business scenarios and complex customer experience situations. To tackle these challenges, we have developed a tailored NetSuite dunning solution.

Our solution effectively solves the common limitations of NetSuite’s Dunning Letters SuiteApp. We offer businesses a flexible, robust, and efficient tool for managing their collections process. Additionally, we strive to make our solution accessible to a wide range of businesses by providing two scalable options: Basic and Advanced Dunning.

  • A. NetSuite Dunning Basic

    Only $149 per month per NetSuite instance/account, prepaid annually. Perfect for organizations looking to automate collections and improve cash flow without adding administrative overhead.

    • Custom Recipient Fields – Ability to create other custom recipient fields in addition to native NetSuite recipient fields like email address.
    • Hierarchical Multi-Level Recipients – Configure multiple recipient levels (e.g., Billing Contact, AP Contact, Finance Manager, Parent Company, or other designated recipients) to support progressive collections and escalation workflows.
    • Multiple Delivery Methods – Send notices through various delivery approaches, including automated scheduled runs, manual bulk processing, or targeted ad hoc sends based on your business requirements.
    • Pre-Due Date Frequency Levels – Configure multiple reminder frequency levels before the invoice due date (e.g., 14 days, 7 days, and 1 day before due date) to proactively improve payment collection.
    • Friendly Reminder – Ability to send reminders prior to the due date in bulk or automatically.
    • Due Date – Ability to send invoices that are due today in bulk or automatically.
    • Last Level Dunning – Ability to send recurring notices after the last defined frequency level.
    • Attachment – Ability to attach a PDF file.
    • Subsidiary – Ability to configure dunning by subsidiary or across multiple subsidiaries.
    • Past Due Customer Record – Ability to send dunning notices to the parent company for all overdue invoices belonging to its child customers.
    • Consolidated Notifications for Last Level Dunning – Ability to consolidate multiple overdue invoices into a single notification when they share the same frequency level. A prerequisite is that all overdue invoices use the same aging bucket or email template.
    • Reporting & Forecasting – Reporting and forecasting capabilities are coming soon.
  • B. NetSuite Dunning Advanced

    Only $179 per month per NetSuite instance/account, prepaid annually. Designed for organizations requiring more sophisticated collections communications and document management.

    Includes all NetSuite Dunning Basic features, plus:

    • Multiple Attachment – Supports sending multiple attachments within a single dunning notification.
    • File Merging & Compression – Automatically merges and compresses attachments to comply with NetSuite governance and attachment size limitations, enabling delivery of documents whose combined size exceeds 10 MB.
  • One-Time Implementation Fee

    In addition to the recurring SaaS subscription, a one-time implementation fee of $1,999 for Basic or $2,999 for Advanced, applies for the initial setup, configuration, and deployment of the Excelym NetSuite Dunning Solution.

    Implementation begins in your NetSuite Sandbox environment for configuration and testing before being deployed to your Production account upon your approval.

    Additional customizations, if required, will be quoted separately based on your business requirements.

Advantages of an Automated Dunning Process

Suit Your Collections Strategy – Provide users with flexibility and customization allowing better monitoring and control of the collection process.

Improved Cash Flow – Quickly collect payments and reduce customer delinquency, resulting in improved cash flow.

Reduced Time – Cut the time spent on manually sending out reminders or collections notices which leads to a higher efficiency in the accounts receivable process.

Better Customer Experience – Give customers the opportunity to pay their bills on time, without having to worry about missing payment reminders or notices.

Excelym NetSuite Dunning Solutions FAQs

To help you better understand our tailored NetSuite Dunning Solution, we’ve compiled a list of frequently asked questions. Whether you’re curious about setup, automation capabilities, or the specific benefits our solution offers, we’ve got you covered.

What is Dunning?
Dunning, also referred to as “collections,” is the process of reminding customers to pay overdue invoices. It ensures timely payments and improves cash flow.
How does the Excelym NetSuite Dunning Solution work?
Excelym’s customized NetSuite Dunning Solution goes beyond standard NetSuite dunning letters and traditional workflow-based dunning processes. While the NetSuite dunning letters module can be costly and offers limited customization, workflow-based dunning can be even more challenging. It often demands a NetSuite specialist for a one-time setup project, and any future changes would require rehiring them, adding time and cost. In contrast, Excelym provides a fully automated and highly customizable solution tailored to your business needs. With our scalable Basic and Advanced Dunning options, you get a flexible, efficient system that simplifies sending reminders and overdue notices, ensuring your accounts are managed effortlessly without the ongoing hassle of specialist support.
What are the differences between Basic and Advanced Dunning?
Basic Dunning: Includes essential features like reminders, multiple recipients, attachments, subsidiary-specific dunning, consolidated notifications, and overdue customer record functionality.

Advanced Dunning: Includes all Basic features plus file merging and compression, enabling attachments over 10MB to comply with NetSuite’s technical limitations.
Can customization still be accommodated?
Yes, additional customizations can be accommodated at an hourly rate, based on pre-approved estimated hours.
Can dunning notices be sent to multiple recipients?
Yes, you can send notices to multiple recipients and even customize fields or exclude specific customers.
Can overdue invoices be consolidated into one notification?
Yes, if overdue invoices share the same frequency, aging, or messaging template, they can be combined into one notification.
Does the solution support subsidiaries?
Yes, you can configure dunning for single or multiple subsidiaries. NetSuite OneWorld is treated as a single instance or account.
Can I send dunning notices for sub-customers under a parent company?
Yes, the solution allows you to send notices to the parent company for all its sub-customers’ overdue invoices.
Are attachments supported?
Yes, you can attach PDF files to your notifications, with Advanced Dunning enabling file merging and compression for attachments over 10MB.
Are reporting and forecasting features included?
Reporting and forecasting features will be launched soon as part of the solution.

Some of our clients

Stop Chasing Payments Manually

Finance teams should spend their time managing cash flow—not manually sending reminder emails.

Excelym’s NetSuite Dunning Solution helps automate collections, improve customer communications, and reduce overdue receivables while working directly inside NetSuite.


Book a demo

Ready to book a demo? Contact us now and get ready for faster customer payments in NetSuite.



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