Why fax to United States?
传真在美国的医疗、法律和政府系统中根深蒂固。医院、保险公司和药房每天都在使用传真——这在很大程度上是因为HIPAA法规将传真视为传输受保护健康信息的合规方式。法院、美国国税局（IRS）、州政府机构、选举办公室和律师事务所也高度依赖传真来提交文件、送达通知、交换已签署的文件以及接收有时限要求的表格。
如果美国的机构要求您通过传真发送文件，通常是因为他们的内部流程正是围绕传真建立的。通过传真发送往往是将文件送入对方系统最快的方式。海外或军队选民在发送选举材料前，也应查阅我们关于如何从海外传真美国初选选票、FPCA或FWAB的指南。
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.