Installs in ~2 min· 2 assets · 4 steps

Catch duplicate and incomplete invoices before an approver sees them

Duplicates, missing fields, and over-threshold amounts get caught before an approver sees the invoice.

Approvers shouldn't be the ones spotting that an invoice was already paid last month. A submitter uploads the vendor invoice and types its key fields. AI validates them (missing data, amounts over your threshold, line items that don't reconcile, possible duplicates already on file) and flags what it finds rather than guessing. The approver gets the details, the flags, and a link to the file, and taps once. Approved invoices notify accounting and can be booked straight to QuickBooks.

Free · no credit card · you connect your own apps

The blueprint
Trigger
Invoice Submission is submitted
Every run starts from one submission.
Transform
AI Validate Invoice
AI reads the input and returns a structured result.
Logic
Approver Sign-Off
Pauses for a person to approve or reject.
Logic
Approved or Rejected?
Branches on the outcome, so each path is handled.
Action
Notify & Email the Decision
What gets built

2 things appear in your workspace.

Installing provisions each one, wired together and ready to run.

FormInvoice Submission

Where anyone submits a vendor invoice, the file plus its key fields. Publishing it auto-creates the Invoices response sheet, the single system of record.

WorkflowProcess Invoice

Validates the submission with AI, checks for duplicates, logs it with an internal reference, routes it for approval, then notifies accounting (optionally booking it in your ledger) or emails the submitter on rejection.

What you connect

The apps this recipe needs.

You connect your own accounts. Swap any app that offers an alternative at install.

Approval And Notification
Slack *

Posts the approval request (with the secure review link and invoice file) to the approver, and notifies accounting once an invoice is approved. Swap for Telegram or Discord.

Decision Email
Gmail *

Emails the submitter if an invoice is rejected. Swap for Brevo.

Accounting Ledger
QuickBooks

Optionally books the approved invoice into your accounting ledger. Controlled by the "Record approved invoices in the accounting ledger?" install setting. Swap for Xero, Zoho Books, or FreshBooks.

How it works

Step by step, once it is running.

  1. 01
    An Invoice Is Submitted

    The submitter uploads the invoice file through the Invoice Submission form and types its key fields: vendor, invoice number, dates, amount, currency, line items. Submitting fires the workflow. Type those fields carefully, they're what gets validated. The uploaded invoice travels with the approval request for the human reviewer.

  2. 02
    AI Validates It

    The AI Validate Invoice step checks the submission for missing data, an amount at or above the threshold you configured, line items that don't reconcile against the total, and possible duplicate invoices already on file. It flags what it finds rather than quietly correcting it, the duplicate check alone is usually what pays for the recipe.

  3. 03
    It's Logged and Routed for Approval

    The invoice is written to the Invoices sheet with an internal reference and its validation flags, then routed to your approver in Slack with the submitted details, the flags, and a link to the file. Approve or Reject, one click, full context. Swap Slack for Telegram, Discord, or Google Chat at install.

  4. 04
    Accounting Is Notified, or the Submitter Is Emailed

    On approval, accounting is notified and (if you switch it on at install) the invoice is booked automatically into QuickBooks, Xero, Zoho Books, or FreshBooks. On rejection, the submitter is emailed the outcome so they can correct and resubmit rather than wonder where it went.

What you walk away with
FAQ

Questions about Invoice Processing & Approval.

What does the AI validate?
Duplicates, missing fields and amounts over your auto_flag_amount threshold. Those are the three failure modes that waste an approver's time, so they are caught before the invoice is routed rather than after.
Can it post to our accounting system?
Yes, optionally. Turn on book_to_quickbooks and supply your company and customer ids, and approved invoices are booked to QuickBooks. Xero, Zoho Books and FreshBooks are listed as alternatives at install.
What do I need to connect?
Slack and Gmail are required. Slack routes the approval request and notifies your accounting channel, and Gmail emails the submitter the outcome. QuickBooks is optional and only used if you enable booking.
Who approves the invoice?
The approver you nominate at install. The workflow pauses for that decision, and the submitter is emailed the result, so there is no state where an invoice is approved without a person or rejected without anyone being told.
Where is the audit trail?
Publishing the Invoice Submission form auto-creates its response sheet, and each invoice lands there with its uploaded file, AI validation result, routing and final decision on one row.
More recipes

Install it, then make it yours.

Everything it creates is an ordinary form, table and workflow in your workspace. Edit any of it after install. Nothing is locked.