When a vendor bill is addressed to a different name or address than your registered company, the IRS still allows a legitimate business deduction if you can show the expense was ordinary, necessary, and paid for business purposes. FilePile's Billing Details Verification (Business plan) reads who each invoice was sent to, compares it with your company profile, and when something does not match, guides you through documenting why the cost still belongs in your books.
What this guide covers
You will understand what the IRS expects for mixed or mismatched billing, how FilePile flags invoices, and how to generate a polished expense justification PDF that stays filed next to the original invoice.
Before you begin
- Business plan with Billing Details Verification enabled.
- Your Company details and profile address saved at /account/company and /account/profiles.
- The vendor PDF already uploaded and processed.
What the IRS generally expects
For any business deduction, keep records that show:
- Who was paid (vendor name and invoice reference).
- How much and when (amount and date on the bill).
- Business purpose (why the expense relates to your trade or business).
- Proof of payment when possible (bank statement, card receipt, or transfer confirmation).
When the bill-to block on the PDF shows a personal name, old trade name, or home address instead of your current legal entity, auditors look for a written explanation plus supporting proof that the company still paid and benefited from the expense. FilePile automates that written record for you.
Step-by-step: review a billing mismatch task
- Log in and open Dashboard (/dashboard).
- Click the Tasks tab (or the alert badge if tasks are waiting).
- Open the invoice that says Billing details mismatch.
- Read the comparison: what appears on the PDF versus what is on your company profile.
- Review the vendor PDF in the panel on the right.
Step-by-step: remove the invoice (if it is not a business cost)
- In the task panel, click Remove invoice if the bill is personal or invalid.
- Confirm removal. The invoice is deleted from your ledger and folders.
Step-by-step: document a legitimate company expense
- In the same task, write a short note under Why is this a company cost? Explain the real-world reason (for example: "Billed to my former sole proprietorship name but paid from the company account for our production server").
- Optionally click Add images or drag screenshots into the upload area.
- For each image, describe what it shows (for example: "Business checking account payment on 27 May 2026").
- Remove any wrong image with Remove before continuing.
- Click Generate document. FilePile writes a formal justification using your note and images, then saves it as a PDF.
Where your files are stored
After you generate a document, Browse on the Dashboard shows a folder named with the invoice number (for example 20262602923) inside the vendor and month path. That folder contains:
- invoice.pdf - the original vendor bill
- expense-justification.pdf - your signed-off explanation for bookkeeping and tax records
Example path: Vimexx_B.V./Invoices/May_2026/20262602923/
What you should see
- A completed task disappears from the Tasks list.
- Browse shows both PDFs under the invoice reference folder.
- The expense justification opens in a new tab with your company header, narrative, and any images you attached.
Tips and common issues
- Save complete Company details first so rechecks clear false mismatches after you update your legal name or address.
- Attach at least one proof image when the bill-to name is personal; bank or card evidence strengthens your record.
- You can regenerate only while the task is open; after filing, keep the PDF pair in Browse for your accountant.
- This feature documents your position; it does not provide tax advice. Ask your CPA how long to retain records for your entity type.
Related guides
Tip: Treat each mismatch task like a mini audit file: invoice plus written explanation, filed together automatically.