How to send a fax to United States

Why fax to United States?

Fax remains deeply embedded in American healthcare, legal, and government systems. Hospitals, insurance companies, and pharmacies use fax daily — largely because HIPAA regulations treat fax as a compliant method for transmitting protected health information. Courts, the IRS, state agencies, election offices, and law firms also rely heavily on fax for filing documents, serving notices, exchanging signed paperwork, and receiving time-sensitive forms.

If a US organization asks you to fax a document, it is usually because their internal processes are built around it. Sending by fax is often the fastest way to get your document into their system. Overseas or military voters should also see our guide to faxing a US primary election ballot, FPCA, or FWAB from overseas before sending election materials.

What you need

To send a fax to United States with unofax you need four things:

• Your document: PDF, Word, image, or any supported file. PDF gives the best results.
• The US fax number: the United States country code is +1. A typical number looks like +1 212 555 0199 (New York) or +1 310 555 0199 (Los Angeles).
• A payment method: credit card, debit card, Apple Pay, or Google Pay.
• Your email address: for delivery confirmation and proof of receipt.

No account, no subscription, no fax machine required.

Step by step

Sending a fax to United States with unofax takes about two minutes:

• Upload your document: drag and drop or tap to select your file.
• Select the United States and enter the fax number: choose the United States from the country list. Enter the 10-digit number with its area code. unofax adds the +1 country code automatically.
• Enter your email: provide your email address for delivery confirmation and proof of receipt.
• Preview: check each page in the preview. Add a free cover sheet if the recipient requires one.
• Pay: the per-page price is shown upfront. Pay with card, Apple Pay, or Google Pay.
• Done: your fax is sent immediately. You receive a delivery confirmation once the receiving machine acknowledges receipt.

Tips for faxing to United States

A few things to keep in mind when faxing to United States:

• Time zones: the United States spans multiple time zones. If the recipient is a court, clinic, or government office, send during that office's local business hours when possible.
• Area codes matter: US fax numbers use a three-digit area code plus a seven-digit local number. Include the area code even for local numbers.
• Use a clear cover sheet: for tax, medical, legal, or insurance documents, include the recipient department, reference number, and your contact details.
• Use PDF for best quality: official forms, scans, and signed documents fax more clearly when converted to a clean PDF before upload.
• Toll-free numbers supported: unofax can send to many US toll-free fax numbers, including 800, 833, 844, 855, 866, 877, and 888 prefixes.

Common United States fax situations

These are the kinds of local workflows where a fax number can still be the requested channel:

• Tax notices and IRS replies: many taxpayers still fax signed forms, supporting schedules, identity documents, and notice responses to specific IRS fax lines.
• Medical records and referrals: clinics, hospitals, and insurers often use fax for HIPAA-sensitive referrals, authorizations, and records requests.
• Court and legal paperwork: attorneys and self-represented parties may need a timestamped delivery record for filings, signed agreements, or service documents.

Common questions

Quick answers about faxing to United States:

• Can I fax to any US number? — Yes. unofax can deliver to active fax lines in United States. If the recipient has provided a working fax number, you can send to it online.
• How long does delivery take? — Most faxes are delivered within one to three minutes. Delivery time depends on the number of pages and the speed of the receiving machine.
• Can I fax IRS or healthcare documents? — Yes. unofax transmits your document as a fax and sends delivery confirmation when the receiving machine acknowledges receipt.
• How much does it cost to fax to United States? — unofax charges a flat per-page rate. The price in your local currency is displayed before you pay. There are no subscriptions, setup fees, or hidden charges.