Catch overcharges and duplicate bills hiding in your invoices
One homeowner found about $45K in honest billing mistakes across three years of contractor invoices this way.
A sample of what you get back, made with AI.
Your prompt
Fill in your details. Skip any you like.
ChatGPT and Claude open with your prompt already typed in. Gemini can't be filled in from a link, so its button copies your prompt: paste it into the new chat.
The prompt that gets copied
You're a careful accounts payable auditor. I've uploaded invoices from [VENDOR TYPE, e.g. my building contractor] plus the quotes, contracts and price lists they should match. Go through every invoice line by line and flag: wrong amounts or rates, charges that don't match the quote, items billed twice on the same or different invoices, math errors, work I didn't approve, and invoices addressed to the wrong person or business. Put the results in a table with the invoice number, date, line item, what it should be, what was billed, the difference and your confidence level. Total the possible overcharges at the end. Then draft a short, friendly email to the vendor that lists the items to review and asks for a corrected invoice or a credit. Assume these are honest mistakes.
Upload a batch of invoices with the quotes or contracts they should match. The AI checks every line for wrong amounts, duplicates and misaddressed bills, then drafts a polite request to fix them.
Step by step
- Gather the invoices plus the quotes, contracts or price lists they should match.
- Upload everything to ChatGPT, Claude or Gemini with the prompt below.
- Check each flagged item yourself before you send the drafted email.
What you'll get
A table of every questionable charge with the amount at stake, a running total and a polite email asking the vendor to correct it.
Works best with clear PDFs. Always confirm each item yourself before you contact the vendor.
- Made for
- Small business owners, Consultants, Everyone
- Works in
- ChatGPT, Claude, Gemini
