# Check supplier invoices against deliveries

Catch price increases, short deliveries, and duplicate bills before you pay.

Profession: Small business owners (https://melete.si/for/small-business/index.md)

Canonical page: https://melete.si/use-cases/supplier-invoice-check/

## Example request

Match this month’s 46 supplier invoices in my Gmail against the purchase orders and delivery notes in Google Drive. Flag price increases compared with last quarter, quantities billed that do not match what was delivered, and duplicate invoices. Put upcoming due dates in a sheet and draft questions to suppliers for anything that does not add up. Do not pay anything.

## Workflow

1. Match each invoice to its order and delivery note.
2. Flag price changes, quantity mismatches, and duplicates.
3. Prepare a due-date sheet and draft questions for suppliers.

## Result

Invoices sorted into matched and questioned, with due dates and supplier questions ready.

## Human review

You approve every payment and every message to a supplier.

## Collaboration

Your bookkeeper can see the flagged invoices and due dates without access to your inbox.