Automating Dunning and Overdue Payment Reminders
Chasing overdue invoices is one of the most avoided tasks in AR because it means repeatedly asking customers, some of them important accounts, for money that's already late. In practice this means reminders get sent inconsistently, some overdue invoices are never chased at all because whoever owns collections is busy with bigger accounts, and when reminders do go out they're often a generic template that reads the same at day 5 as it does at day 90, which either annoys a customer who just missed the date or fails to convey real urgency to one who's genuinely avoiding payment.
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From €99
Starter tier · Single-workflow automation, one core integration, fast turnaround.
Get a quote →Saves roughly 3-5 hrs/week plus measurable improvement in days sales outstanding.
How the automation works
We build a dunning sequence that escalates automatically as an invoice ages — a light, friendly nudge a few days past due, a firmer reminder at 30 days, and an escalation notice with account context at 60-plus days — pulling the specific invoice, amount and due date into each message so it never reads as a generic template. The sequence checks payment status before every send and stops immediately once an invoice is paid or disputed, so customers never receive a reminder for something they've already settled. Key accounts can be routed to a human for a personal call instead of an automated email at whatever stage you choose.
Process flow
- 01
Invoice ages past due date trigger
Every unpaid invoice is monitored against its due date, with the dunning sequence starting automatically once it crosses into overdue status.
- 02
Confirm still unpaid and undisputed ai
Before every scheduled reminder, current payment and dispute status is checked to avoid sending a chase for something already resolved.
- 03
Select escalation stage ai
The message tone and content escalate based on days overdue — a light nudge early, a firmer reminder later, an escalation notice at the final stage — using real invoice detail throughout.
- 04
Send reminder output
The appropriate reminder is sent automatically by email, referencing the specific invoice, amount and days overdue.
- 05
Escalate key accounts to a human output
Accounts flagged as important or accounts that reach your final automated stage without payment are routed to a collections team member for a personal follow-up instead of another automated email.
Inputs
- Open invoices with due dates
- Payment and dispute status
- Customer contact and account-tier data
- Dunning sequence rules and templates
Outputs
- Sent reminder log by invoice and stage
- Escalation queue for key accounts
- Days-sales-outstanding impact tracking
- Customer response/payment correlation report
Works with
Prefer a fully custom build instead of an off-the-shelf integration? We scope both options during your free consultation — most jobs like this one work fine on standard connectors, but higher-volume or non-standard systems sometimes need bespoke API work, reflected in the complex tier.
Where this goes wrong if you get it wrong
- Sending an automated reminder for an invoice the customer has already disputed or is mid-negotiation on damages the relationship and undermines whoever is handling that conversation — the sequence needs a hard stop tied to a dispute flag, checked immediately before every send, not just at sequence start.
- Key or strategic accounts often need a different approach than an automated email cadence, even for a genuinely overdue balance — build an account-tier exception that routes to a human at an earlier stage than your standard sequence, since a generic dunning email to a major client can cause disproportionate relationship damage.
- A payment that's been sent but hasn't cleared or been applied yet (in transit, or received but not yet matched) looks identical to an unpaid invoice to a naive dunning check — verify against cash application status, not just invoice status, or customers get chased for money they've already sent.
- Reminder tone that escalates too aggressively too early can push a customer with a genuine short delay into disputing the invoice defensively — calibrate the early-stage tone as a helpful nudge, not a demand, and reserve firm language for accounts genuinely well past terms.
Frequently asked questions
Will this send reminders to customers who've already paid?
No — payment and dispute status is re-checked immediately before every scheduled reminder, so an invoice that's been paid or is mid-dispute is pulled from the sequence automatically rather than chased anyway.
Can we set a different approach for our most important accounts?
Yes, key accounts can be flagged to escalate to a human collections contact at an earlier stage, or skip automated reminders entirely in favor of a personal outreach.
How does the tone change as an invoice gets more overdue?
Early reminders read as a light, friendly nudge; later stages get firmer and reference account history and payment terms more directly, escalating to a notice that a human will follow up if unresolved.
Does this actually reduce days sales outstanding?
Consistent, timely reminders typically improve DSO meaningfully because the biggest single cause of late collection is simply inconsistent follow-up, not customers refusing to pay — most overdue invoices respond to a well-timed nudge.