Invoice Correction and Dispute Management with AI Agents
When a bill is wrong - overbilled, underbilled, or disputed - an AI agent reads the time entries, compares them to the invoice, and fixes it in Xero automatically, with a Slack alert either way.
PO mismatches and billing disputes were tracked in email threads and sticky notes. Someone had to manually pull the invoice, the time entries, and the original PO before they could even tell whether a customer's complaint was valid.
An AI agent compares each Xero invoice against actual logged time entries (via Clockify), classifies the result as exact, overbilled, or underbilled, and routes automatically: correct bills get a Slack confirmation, overbilled invoices get a credit note plus a corrected invoice, underbilled ones get a new invoice for the difference - all logged and posted to Slack for visibility.
Stack
How It Works
Watch for new invoices
The workflow triggers on new Xero invoices on a schedule.
Pull the source of truth
Actual logged time entries are fetched from Clockify for the same billing period.
AI compares and classifies
OpenAI compares invoiced amounts against logged time and classifies the result: exact, overbilled, or underbilled.
Route and correct automatically
Exact matches get confirmed in Slack. Overbilled invoices trigger a Xero credit note. Underbilled invoices trigger a new corrective invoice - before a human ever opens the case.
Full audit trail
Every decision and correction is logged and posted to Slack, so nothing gets missed silently.
Results
powered classification
typical resolution
audit trail
The Workflow
This is the actual Slack alert an accountant sees before the invoice ever leaves DRAFT. It doesn't just flag that something is off, it shows billed vs. contracted amounts line by line, calculates the exact gap ($1,150 in this example), and hands over three concrete next steps in the same thread. That's the difference between an invoice quietly going out $1,150 short and a two-minute fix before it ever reaches the customer.
