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Collie + Mollie: reminders that get your invoices paid
Connect Mollie to Collie and every reminder, sent by email, SMS or voice call, leads to a payment link
Chasing unpaid invoices by hand costs you time you don't have and money you're still waiting on. Collie automates the reminder process and lets your customers pay straight away with a Mollie payment link.
Focus on your core business. Collie handles the reminders, Mollie handles the payments.
Built for businesses that invoice people, not companies
Utilities, housing associations, healthcare providers and subscription businesses invoice individual customers rather than other companies, and a share of those invoices always arrives late. Collectmaxx, the company behind Collie, has refined the reminder process for over 20 years, and its wider platform collected more than €63 million in overdue invoices in 2025.
Collie decides which message is most likely to reach a customer who still needs to pay, then sends a personalised message by email, SMS or an automated voice call from a dedicated Dutch phone number. Every reminder points to a Mollie payment link, so the customer can pay in one tap and the invoice closes itself.
Everything you need to turn reminders into payments
Smart reminders, not a fixed schedule. Collie picks the next step for every open invoice: email first, SMS if that goes unread, then a phone call when it matters.
Pay in one tap, with the methods your customers already use. Each payment link is set up to accept iDEAL | Wero, credit and debit card, direct debit payments, and more, so there's no bank reference to chase.
Live in minutes, with no developer required. Connect your existing Mollie account or create one directly inside Collie, with no API keys needed.
Reminders that keep the relationship intact. A reminder is also customer contact, so Collie adapts its tone and channel to how each customer responds, to get the invoice paid without damaging the relationship.
From sign-up to your first reminder
Create a Collie account and connect Mollie. Sign up with Collie, then connect an existing Mollie account or create one directly inside Collie, with no API keys required.
Wait for Mollie to verify your business. This usually takes one to two business days and protects you and your customers against fraud.
Upload your open invoices. Drop in a CSV or Excel file, and Collie checks it for missing details before any reminder goes out.
Let Collie take over. Reminders go out automatically by email, SMS and voice call, each one directing to a Mollie payment link.
Payments land directly in your Mollie balance and pay out on your own schedule. Collie only checks whether an invoice has been paid, so it knows exactly when to stop reminding.
Reminded automatically. Paid easily.
Leave the reminders to Collie and the payments to Mollie.
