Your parts statements, checked line by line against your invoices.

• You sent the core back. The credit never showed up.
• You returned the part. The statement still bills it.
• The same invoice is on the statement twice.
• The price on the statement isn't the price on your PO.

Nobody has time to match a month of statements line by line, so most shops pay the total and move on.

One shop owner doing about $850k a year found roughly $15,000 in lost parts once he started checking supplier statements against his own invoices. Read his story on Protractor.

1. Pay $49

   By card, through Stripe. You get a receipt by email.

2. Reply to the receipt with your files

   Last month's statements (PDF or a portal export) and your POs or invoices for the same month. Customer names blacked out is fine.

3. Get the list within 24 hours

   Every line that doesn't match, with the dollar amount per line. You decide what to take to your supplier.

• Invoices on the statement that aren't in your system.
• The same invoice billed twice.
• Core, warranty and return credits that are missing or short.
• Unit prices that differ from your PO.
• Tax or freight lines you didn't agree to.

Suppliers NAPA, O'Reilly, AutoZone, Advance/Carquest, WorldPac, local jobbers — anyone who sends you a statement.

$49 flat. If the audit finds nothing, you get the $49 back.

No fine print.

Marat, Korpesh, LLC

I'm Marat. I build software for a living, mostly back-office systems where the numbers have to match to the cent. Korpesh, LLC is my company. The audit isn't a department: your files come to me, I run the check, I read every mismatch, I send you the list.

Your files are used only for this audit and deleted after you get the report. No reselling, no mailing list.

Do you do this by hand or with software?

Both. A checker I built does the matching. I go through every mismatch myself before it goes to you, so you don't take a wrong line to your supplier.

What do I send?

Last month's statements from your parts suppliers — PDF or an export from their portal — and your POs or parts invoices for the same month. Customer names blacked out is fine.

Which suppliers?

Any supplier that sends you a statement: NAPA, O'Reilly, AutoZone, Advance/Carquest, WorldPac, your local jobber.

I use Tekmetric, Shop-Ware or Mitchell 1. What do I send?

Export the parts purchase or vendor report for the month. If that's a hassle, just send the invoices.

How do I pay?

By card, through Stripe. Reply to the receipt email with your files.

What if you find nothing?

You get the $49 back.

Why so cheap?

It's one month, done once. No subscription, no software to set up. If it turns out to be worth more to you, we talk after.