How to mail a letter in the United States online

To mail a letter online to the United States, upload the finished PDF, enter the sender address and the recipient's address in the United States, and review the printable document. PostalForm checks the destination, page count, file size, and selected services before showing the final price. Nothing is mailed until you approve and pay for the order.

PostalForm routes eligible domestic letters through its US print-and-mail network. Final delivery is handled by the United States Postal Service (USPS). The checkout result is authoritative because eligibility can depend on the document and addresses.

• USPS First-Class Mail for eligible domestic letters. This is PostalForm's lowest-priced U.S. letter service; USPS Marketing Mail (formerly Standard Mail) is not offered.
• Expedited mail when the entered addresses and document qualify.
• USPS Certified Mail when you need proof of mailing and delivery history. An electronic return receipt can be added when eligible.
• Signature service is available with eligible expedited US orders.

Certified Mail is a proof service, so it cannot be combined with expedited delivery in the same order.

1. Prepare the final letter as one PDF, including signatures and attachments.
2. Upload the PDF using the file selector on this page.
3. Enter the recipient's complete mailing address in the United States and your return address.
4. Review the rendered pages, print settings, available delivery services, and exact price.
5. Pay only after the address, document, and mailing option are correct. PostalForm then prints, envelopes, posts, and tracks the production handoff.

Use a complete USPS-format address with the recipient name, street address, city, two-letter state code, and ZIP Code. Upload one final PDF with all pages in the correct order. The checkout validator will flag unsupported page sizes, excessive page counts, or address problems before payment.

The price depends on the PDF page count, color or black-and-white printing, single- or double-sided printing, destination, and selected delivery or proof service. PostalForm shows the exact price and an estimated delivery window before payment. Carrier dates are estimates rather than guarantees, and registered or certified proof services cannot be combined with expedited delivery.

PostalForm mail orders are priced in U.S. dollars. Checkout accepts major debit and credit cards and, on compatible devices and accounts, can show Apple Pay, Google Pay, or Link. Cash App Pay is enabled in PostalForm's Stripe account for U.S. customers, but the current mail-order authorization does not offer redirect-based methods, so Cash App Pay is not yet shown for these orders. The payment methods displayed at checkout are authoritative.

Carrier and service descriptions are based on the USPS Certified Mail overview and PostalForm's currently configured provider routes. Available options are confirmed for the individual order at checkout.

Payment-method availability is based on Stripe's payment-method support matrix and dynamic payment-method eligibility rules.

PostalForm offers U.S. letter mailing with different delivery and proof options. First-Class suits routine correspondence; Certified Mail adds mailing and delivery records, and Electronic Return Receipt adds a downloadable signature record. Expedited delivery prioritizes speed. Review the destination, estimated dates, total price, and required proof before paying.

Availability and delivery estimates depend on the document and destination. Mailing proof does not establish that a recipient accepted a filing or that legal service requirements were met. Review delivery estimates and full pricing.