Turnstile offers Automated Invoice Collection to automate dunning. This is an intelligent system that automatically reminds customers to pay invoices while maintaining a positive relationship. When enabled, Turnstile follows up on invoices in a way that is consistent, respectful, and tailored to how your customers typically pay.
Every customer is different and has a different payment history. The agentic dunning model looks throughout a customer’s life cycle to determine the most effective messaging and frequency.
Determines the payment history of each customer
Decides whether a reminder is necessary
Selects an appropriate tone (friendly to firm)
Sends one clear message per day, at most
Bundles multiple invoices into a single digest when needed
Enabling Automated Invoice Collection
To enable or disable this functionality, visit your Invoice Settings. You can simply toggle on or off.
Invoice Eligibility
Invoices must meet the following criteria to be eligible for Automated Invoice Collection:
The invoice provider must be set to Stripe or Turnstile with Stripe as a payment processor.
The status of the invoice must be Issued.
Reminder Types and Frequency
Depending on the customer history, Turnstile will determine which reminder types are necessary. There are three reminder types:
Pre-due reminder - Sent shortly before an invoice is due (3 days before)
Due-date reminder - Sent on the day the invoice is due
Overdue reminder - Sent after the invoice becomes late (starting 1 days past due)
Overdue reminders follow a structured schedule. While this varies customer to customer, a typical reminder timeline looks like this:
Day 1
Day 7
Day 14
Day 21
Day 30
Reminders will then be sent less frequently up to Day 180.
After Day 180, dunning reminders cease.
Messaging and Tone
Automated Invoice Collection evaluates each customer’s payment history over the past 12 months. Customers are then classified into one of three broad categories:
Healthy
Usually pays on time
Receives minimal reminders
Tone is friendly and non-urgent
Watchlist
Occasionally late
Receives standard reminders
Tone is direct but polite
Unhealthy
Frequent or serious lateness
Receives earlier and stronger reminders
Tone is more urgent but still professional
Regardless of the category, messages remain professional and relationship-safe.
Reminder History and Visibility
When Automated Invoice Collection is enabled, you can always view reminder history. This includes:
Whether automated collection is active
Which reminders were sent
Exact email content
Send timestamps
Upcoming evaluation timing
Status indicators on invoices and customers
You can view this information in a specific Invoice, on the Customer page, and in event history timelines.