> ## Documentation Index
> Fetch the complete documentation index at: https://docs.getmeasure.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Invoice Butler

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Invoice Butler integration follows up on overdue Measure invoices, including invoices that must be submitted through customer supplier portals.

Measure's own [reminder schedules](/pages/guides/payment-recovery#unpaid-invoice-reminders) can get you pretty far on their own for automated dunning. Invoice Butler is for going the last mile on collections beyond automated reminders — supplier portals, escalations, and cases that need a person.

## Key Capabilities

* **Payment follow-ups**: Sends reminders and outreach on overdue invoices based on customer payment behavior
* **Supplier portal submission**: Submits and tracks invoices through customer supplier portals, including Coupa, Ariba, and Tipalti
* **Escalation sequence**: Overdue invoices move through a defined escalation sequence rather than a single reminder
* **Human follow-up**: Non-standard collections cases are handled by a person rather than automation alone

## How It Works

Measure generates invoices from your contracts and pricing as usual. Once an invoice becomes overdue, Invoice Butler takes over collection: sending follow-ups, submitting to supplier portals where required, and escalating according to the configured sequence.