---
title: "How to send a PDF fax online with an AI assistant | Postedly"
description: "Send a PDF fax online with Postedly: check the US fax number, preview the cover and document, review the quote, and follow the transmission result."
url: "https://postedly.com/guides/send-a-fax-with-ai"
---

# How to send a PDF fax online with an AI assistant

Start with a finished PDF and the recipient’s fax number. Your assistant can help transfer the file and prepare a Postedly quote; you review the complete fax and total before approving payment.

Reviewed November 4, 2026

## Availability and price

**$2.99** Available at last check

USD. Prices exclude applicable tax. Standard handwritten cards include US postage. “From” indicates a variable price. “Custom price” requires manual review of an object request. Eligibility and the final total are confirmed in your quote. [View the source catalog](https://postedly.com/api/catalog) or [read how pricing works](https://postedly.com/pricing).

## What you need

- An unencrypted PDF of up to five document pages and at most 10 MiB. Postedly adds a cover page for you to review.
- A supported United States recipient fax number in +1 format. US recipients with supported toll-free numbers are included; premium destinations are excluded.
- Your sender name, email, and United States billing address. A fax number by itself does not establish the recipient’s identity.

## Prepare the fax

1. ### Make the final PDF available.
   Use your assistant’s connection guide and give it access to the actual file. If file access fails, use the private upload handoff or the Postedly website.
2. ### Request a quote for the exact number.
   Ask the assistant to check Fax availability and prepare the quote with your sender information and the recipient’s number.
3. ### Review the complete fax.
   Check the PDF returned with the quote, including its generated cover page. Confirm the number, document, page count, total, and sending approval before payment.
4. ### Keep the order reference.
   After checkout, read the payment state and transmission result on the existing order. Do not create a duplicate while the first result is still pending.

Example request

> Use Postedly to prepare a fax of this finished PDF to the US fax number I provide. Check availability and show me the final PDF including the cover page, recipient number, and total. Wait for my approval before payment.

- [ChatGPT setup and limits](https://postedly.com/agents/chatgpt)
- [Claude and Cowork setup and limits](https://postedly.com/agents/claude)
- [Muse setup and verified stages](https://postedly.com/agents/muse)
- [Grok and Grok Bot setup and limits](https://postedly.com/agents/grok)
- [All assistant guides](https://postedly.com/agents)

## Check the PDF and fax number before you pay

- Open the finished PDF and check that every page is legible, correctly oriented, and included. The five-page limit applies to document pages; the generated cover is added separately.
- Confirm the destination number using a trusted source, not only the number supplied in a message. A valid number is not proof that it belongs to the intended recipient.
- Inspect the generated cover together with the document. If the number, file, or sender details are wrong, correct them and request a fresh quote before approving payment.

- [Understand quotes, payments, and delivery status](https://postedly.com/guides/understand-order-status)

## A successful fax means transmission succeeded

The fax quote describes transmission as usually completing within minutes, followed by a report. This is an estimate. A delivered fax result is evidence of transmission to the receiving fax system; it does not prove that a person read, accepted, or acted on the document.

If the result is pending or unclear, check the existing order. If it failed, review the failure information and contact support before preparing another attempt.

- [Understand quotes, payments, and delivery status](https://postedly.com/guides/understand-order-status)

## Use the website when the assistant cannot transfer the file

Download the final PDF, choose Fax on Postedly, and upload it yourself. The same document review and sender email verification apply.

- [Help your assistant access the PDF](https://postedly.com/guides/ai-cant-access-pdf)

## Ready for the next step?

[Prepare a fax](https://postedly.com/send?service=fax)

## Keep going

- [Fax service](https://postedly.com/services/fax)
- [Prices and what changes your quote](https://postedly.com/pricing)
- [Understand quotes, payments, and delivery status](https://postedly.com/guides/understand-order-status)