Is it secure to fax IRS Form 8821 online?

Yes. Your upload travels over TLS, is stored encrypted with 256-bit AES, and is deleted after the fax completes. The document is delivered over the phone network to the receiving machine, so it never sits in an email inbox.

How fast does Internal Revenue Service (IRS) receive a digital fax?

Transmission usually completes in one to three minutes. The fax lands on the recipient's machine or fax server exactly as a traditional fax would, and you receive a timestamped confirmation you can cite if the document is later questioned.

How much does it cost to fax IRS Form 8821, and do I need an account?

It's a flat $2.99 per fax for 1–2 pages — no account, no subscription, and no monthly minimum. The card is only charged once delivery to Internal Revenue Service (IRS) is confirmed; failed transmissions are never billed.

Government & Tax Forms

How to Fax IRS Form 8821 (Tax Information Authorization) Online

Quick answer

To fax IRS Form 8821 (Tax Information Authorization) online, upload the signed PDF to FaxASAP, enter the fax number for Internal Revenue Service (IRS), add a cover sheet, and pay $2.99. It transmits in about a minute with an emailed PDF delivery receipt.

Third-party disclosure authorizations must reach the CAF unit by fax or mail because email is not an approved channel for taxpayer data.

No sign-up required
File deleted after sending
256-bit encryption
Pay only if delivered

~1 minute: Typical transmission time
Standard Encrypted: Encryption standard
1–2 pages: Typical length

Send IRS Form 8821 (Tax Information Authorization) in 4 steps

1
Upload your IRS Form 8821 as a PDF, JPG, or PNG (up to 8MB). FaxASAP encrypts the file in transit and deletes it once transmission finishes.
2
Enter the fax number for Internal Revenue Service (IRS). Any US or Canadian fax line works — type the 10-digit number exactly as it appears on your notice or instructions.
3
Add a cover sheet with your name, case or account reference, and the 1+ page count so the receiving clerk can match your IRS Form 8821 to the right file.
4
Pay the flat $2.99 authorization and watch live status. You're charged only when Internal Revenue Service (IRS) confirms receipt, and you get a PDF proof-of-delivery receipt by email.

Document specifications

Specifications for faxing IRS Form 8821 (Tax Information Authorization) with FaxASAP
Document name	IRS Form 8821 (Tax Information Authorization)
Receiving agency / sector	Internal Revenue Service (IRS) — Government & Tax Forms
Encryption & privacy standard	Standard Encrypted
Typical page count	1–2 pages
Delivery confirmation	Email + PDF proof of delivery
Price	$2.99 flat — charged only on confirmed delivery

Frequently asked questions

Ready to fax IRS Form 8821 (Tax Information Authorization)?

Upload, enter the number for Internal Revenue Service (IRS), and send. Flat $2.99, no account, and you're only charged once delivery is confirmed.

Send this fax now

Other documents people fax alongside IRS Form 8821 (Tax Information Authorization).

Browse all 100 guides More Government & Tax Forms guides