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How Can Businesses Automatically Follow Up on Unpaid E-Invoices?

Friso van de Beeten ·
Laptop displaying a digital invoice on a modern office desk beside a smartphone with a notification alert and small succulent plant.

Businesses can automatically follow up on unpaid e-invoices by using credit management software or accounts receivable automation tools that send scheduled payment reminders via email, WhatsApp, or SMS without any manual effort. These tools connect directly to your accounting or ERP system, detect overdue invoices, and trigger personalised reminder sequences on your behalf. The sections below walk through everything you need to set this up effectively.

What tools can automate follow-up on unpaid e-invoices?

The most effective tools for automating unpaid e-invoice follow-up are dedicated credit management platforms that integrate with your existing accounting or ERP system. These tools read your invoice data in real time, identify what is overdue, and send payment reminders automatically based on rules you define. You do not need to check spreadsheets or manually draft emails.

Businesses typically choose from a few categories of tools depending on their setup:

  • Credit management software such as dedicated accounts receivable platforms that handle the full follow-up workflow, from first reminder to escalation
  • Built-in features within accounting packages like Exact, Twinfield, or AFAS, which often include basic reminder functionality but with limited customisation
  • ERP integrations for larger businesses using SAP, NetSuite, or Salesforce, where receivables automation can be layered on top of existing workflows

The key advantage of a standalone credit management platform is flexibility. You can set up different reminder sequences for different customer types, adjust the tone depending on the relationship, and track the full communication history in one place. Most modern platforms connect with over 800 accounting, ERP, and CRM systems, so getting started does not require rebuilding anything you already have in place.

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How does automated e-invoice follow-up actually work?

Automated e-invoice follow-up works by connecting your invoicing or accounting system to a payment reminder tool that monitors due dates and triggers pre-written messages when invoices go unpaid. Once you configure your reminder schedule and message templates, the process runs without manual input. You set the rules once, and the software handles the rest.

Here is what happens in practice:

  1. The software syncs with your accounting or ERP system and pulls in open invoice data
  2. It checks due dates continuously and flags invoices that are approaching or past their payment deadline
  3. Based on your configured workflow, it sends a reminder at the right moment through your chosen channel
  4. If the invoice remains unpaid, it escalates to the next reminder in the sequence
  5. When payment is received, the workflow stops automatically so customers do not receive unnecessary messages

The real time-saving comes from the fact that none of this requires someone to sit down, check a list, and write an email. The automation handles the repetitive work, while your finance team focuses on the cases that genuinely need a human conversation.

Which communication channels work best for payment reminders?

Email remains the most widely used channel for e-invoice payment reminders because it is professional, documentable, and easy to personalise. However, combining email with WhatsApp or SMS significantly improves response rates, particularly for overdue invoices where a quick nudge through a more direct channel can prompt faster action.

Email for formal reminders

Email is well suited for the first and second reminders in a sequence. It gives customers space to respond at their own pace, allows you to include invoice details and a direct payment link, and creates a clear paper trail. For B2B relationships, email also feels appropriate and professional at every stage of the process.

WhatsApp and SMS for urgent follow-up

WhatsApp and SMS are more personal and immediate. Open rates for these channels are considerably higher than email, which makes them effective when an invoice is significantly overdue and you need a faster response. Many businesses use these channels for the third or fourth reminder in a sequence, or when a customer has not responded to previous emails. The key is to keep the message short and friendly, and include a clear link to pay or get in touch.

How many reminder messages should be sent before escalating?

Most businesses find that a sequence of three to four reminders strikes the right balance between persistence and maintaining a good customer relationship. A typical structure starts with a friendly nudge shortly after the due date, followed by progressively firmer messages at regular intervals before escalating to a collections process or direct contact.

A practical reminder sequence might look like this:

  • Reminder 1 (a few days after due date): A polite, friendly message assuming the oversight was accidental
  • Reminder 2 (one to two weeks overdue): A clearer follow-up referencing the outstanding amount and original due date
  • Reminder 3 (two to three weeks overdue): A firmer message noting that the invoice remains unpaid and asking for a response
  • Reminder 4 or escalation (one month or more overdue): A final notice before the case is handed to collections or a senior contact reaches out directly

The right number depends on your industry, your customer relationships, and the invoice value. High-value invoices may warrant more touchpoints and a phone call earlier in the sequence. For smaller amounts, a shorter sequence is often enough to prompt payment without over-investing time.

What information should an automated e-invoice reminder include?

An effective automated e-invoice reminder should include the invoice number, the amount due, the original due date, a direct payment link or clear instructions on how to pay, and contact details for questions. Keeping the message concise and making it easy to act on are the two most important factors in getting a response.

Beyond the basics, consider including:

  • The customer’s name or company name to make the message feel personal rather than generic
  • A brief, friendly explanation of why you are reaching out, especially for early reminders
  • A summary of any previous reminders sent, so the customer has full context
  • A clear subject line that references the invoice and the outstanding amount

Tone matters as much as content. Early reminders should assume good faith and stay warm. Later reminders can be more direct, but there is rarely a reason to be aggressive. Customers who feel respected are more likely to pay promptly and maintain the relationship, which is the outcome every business wants.

How can businesses monitor creditworthiness alongside invoice follow-up?

Businesses can monitor customer creditworthiness in real time by integrating their credit management software with a credit data provider such as Dun and Bradstreet. This gives you an early warning when a customer’s financial situation changes, so you can adjust payment terms or follow-up intensity before an invoice becomes a problem rather than after.

Combining creditworthiness monitoring with automated invoice follow-up creates a more complete picture of your receivables risk. For example, if a long-standing customer suddenly shows a deteriorating credit score, you might tighten payment terms on their next order or prioritise their overdue invoice in your follow-up sequence. Without this visibility, you are reacting to late payments after the fact instead of managing the risk proactively.

This kind of integrated approach is especially valuable for businesses that extend credit regularly or work with a large number of customers. Keeping payment behaviour and creditworthiness data in the same platform means your finance team does not have to cross-reference multiple systems to make informed decisions.

How MaxCredible helps with automated e-invoice follow-up

We built MaxCredible to take the manual effort out of chasing unpaid invoices, so your finance team can focus on work that actually needs their attention. Here is what you get out of the box:

  • Automated payment reminders sent via email, WhatsApp, and SMS based on rules you configure once
  • Seamless integrations with over 800 accounting, ERP, and CRM systems including Exact, AFAS, Twinfield, SAP, and Salesforce, so you are up and running within 24 hours
  • Real-time creditworthiness monitoring through a Dun and Bradstreet integration, giving you early signals on customer risk
  • Centralised communication history so every reminder, response, and payment note lives in one place
  • Personalised messaging that matches your brand tone and adapts to the customer relationship
  • A fixed monthly fee of €199, with no local installation and no complex setup project

Our clients typically see payments arrive up to 50% faster and save up to 80% of the time previously spent on manual follow-up. If you are ready to stop chasing invoices by hand, get in touch with us and we will show you how quickly you can get started.

Frequently Asked Questions

How long does it take to set up automated e-invoice follow-up for the first time?

Most businesses can get automated e-invoice follow-up running within 24 hours, particularly when using a platform like MaxCredible that offers pre-built integrations with common accounting and ERP systems. The main setup tasks involve connecting your accounting system, configuring your reminder schedule, and writing your message templates — none of which require technical expertise or IT involvement. Once the initial configuration is done, the system runs automatically without any ongoing setup work.

What if a customer disputes an invoice — will the automated reminders still go out?

This is one of the most important things to configure before going live. Most credit management platforms allow you to pause or exclude specific invoices from the reminder workflow, so disputed invoices can be flagged and held while the issue is resolved. It is good practice to review your dispute-handling process before automating, and to ensure your team knows how to put an invoice on hold quickly if a customer raises a concern. Sending reminders on a disputed invoice can damage the customer relationship, so having this safeguard in place matters.

Can I use different reminder sequences for different types of customers?

Yes, and this is one of the key advantages of using a dedicated credit management platform over basic reminder features built into accounting software. You can typically create separate workflows for different customer segments — for example, a gentler sequence for long-standing clients and a more urgent one for new customers with no payment history. You can also adjust timing, tone, and communication channel per segment, which means your automation reflects the nuance of your real customer relationships rather than treating everyone the same way.

What happens when a customer partially pays an invoice?

Good credit management software handles partial payments by syncing with your accounting system in real time and updating the outstanding balance automatically. The reminder workflow will continue for the remaining unpaid amount, and the message content should reflect what is still owed rather than the original total. It is worth checking how your chosen platform handles partial payments during setup, and ensuring your message templates are written in a way that makes sense whether the full amount or a partial balance is outstanding.

Is automated invoice follow-up suitable for small businesses, or is it mainly for larger companies?

Automated invoice follow-up is arguably more impactful for small businesses than for large ones, because small finance teams have the least capacity to spend time on manual chasing. Even a business sending 20 to 30 invoices per month can benefit significantly from automation, since the time saved on follow-up can be redirected to higher-value work. Flat-fee pricing models, such as a fixed monthly cost, also make it easy for smaller businesses to budget without worrying about per-user or per-invoice charges.

How do I make sure automated reminders don't feel impersonal or damage customer relationships?

The key is in the message templates and the sequencing logic. Early reminders should be warm, assume good faith, and use the customer’s name and specific invoice details to feel personal rather than generic. Avoiding overly formal or aggressive language in the first two reminders goes a long way toward maintaining goodwill. Most platforms also allow you to customise tone per customer segment, so your longest-standing clients receive messages that reflect the relationship you have built with them, not a one-size-fits-all automated notice.

What should I do if a customer still hasn't paid after the full reminder sequence is complete?

Once the automated sequence is exhausted, the next step is typically a direct personal outreach — a phone call from a senior contact or account manager — followed by a formal final demand letter if needed. If the invoice remains unpaid after that, most businesses either engage a collections agency or pursue the matter through a small claims or commercial court process, depending on the amount and jurisdiction. Having a clear escalation policy defined before you start automating means your team always knows the next step without having to make a judgement call each time.

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This content was generated with the help of AI and it may contain mistakes