When it comes to registered letters, the US postal service steps up to ensure your package's safety from start to finish. Plus, they offer insurance coverage of up to $50,000 (with some limitations). This method is ideal for sending valuable contents through the mail.
Key Steps
Preparing Your Mail at the Post Office

Find and Visit Your Nearest US Post Office. Explore here to locate the closest branches. You can even find smaller branches inside stores like Office Depot or Staples, where the staff can assist you with sending registered mail.

Locate the service desk area. Here, you'll discover an array of forms catering to USPS mailing services. Don't hesitate to seek assistance from a postal staff member if you're unsure about which form to use — PS Form 3806 is the one you'll need for this task.
- To avoid the hassle of searching for the form in-store, you can directly download PS 3806 from the USPS website here.

Complete the relevant registered mail form. There are distinct forms for domestic and international registered mailings. Take your time reviewing the form before filling it in.
- If there's a queue, it's best to join it while filling out the form. By the time you're done, you'll have progressed through the line considerably.
- In the absence of a queue or if it's short, complete the form at the service area to avoid inconveniencing others by holding up the line.

Present the completed PS Form 3806, along with payment and the letter, to the counter attendant. While the cost of sending registered mail has increased over recent years, it's typically a little over $10.
- The post office accepts various payment methods including cash, credit/debit cards, and checks (with valid ID).
- Ensure the attendant furnishes you with a transaction receipt. If they forget, don't hesitate to request it — after all, it's why you're paying for this service! The receipt serves as evidence of when the letter was sent, protecting you if it doesn't reach its destination as intended.

Inform the counter attendant if you wish to insure the letter. USPS provides insurance coverage up to $25,000 for registered mail. The insurance rates will vary based on the desired coverage amount.
Preparation of Your Registered Mail from Home or Office

Head to your local post office branch to acquire permission for self-printing the necessary labels. Find the closest branches here.
- Authorization for off-site printing is required for Label 200.
- This privilege is typically granted to frequent senders of registered mail. For one-time users, opt for the traditional post office method.
- Off-site printing authorization is restricted to domestic mail. For international shipments, visit the post office.

Complete PS Form 3806 electronically. This minimizes issues with unclear handwriting, ensuring smooth processing by postal staff. Double-check the form before printing.

Print the necessary documents: Label 200 and the completed PS Form 3806. Ensure your printer has adequate ink levels for legible printing.
- Print PS Form 3806 in black and white, and Label 200 in color to closely resemble the official Postal Service label.
- Label 200 must be printed on either 1) white OCR bond, 20-pound paper (17 inches × 22 inches) with minimal fluorescence, or 2) Smudge-proof Litho Label, 50-pound paper (17 inches × 22 inches), with permanent adhesive coating.
- Affix Label 200 directly onto the letter. Avoid overlapping corners to maintain readability and barcode scanning.

Attach Label 200 to the intended letter. Ensure it lays flat without bending over edges, which may hinder readability or barcode scanning.

Drop off the letter and PS Form 3806 at the post office for dispatch. Submit the completed PS Form 3806, payment, and the letter to the counter staff.
- If the transaction receipt is overlooked by the staff, politely request it for your records.

Inform the counter attendant if you wish to acquire insurance for your letter. USPS provides insurance coverage up to $25,000 for registered mail. Rates vary based on your desired coverage amount.
Insights
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If you're uncertain about which form to use, queue up (if there's a line) and ask a U.S. Postal Service representative for assistance. They'll provide you with the appropriate Registered Mail form, guide you through filling it out, and charge you only for postage. Submit the letter and form to the representative for processing and receipt issuance.
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If ensuring receipt by the recipient is your main concern, consider opting for 'Certified Mail, Return Receipt Requested' instead. Follow the same instructions outlined here, but seek two forms: a green card, which requires completion on both sides, and a white/green form titled 'U.S. Postal Service Certified Mail Receipt.' This service is for domestic mail only and doesn't include insurance. Submit the letter and forms to the representative for processing and receipt issuance.
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Alternatively, you can visit a local UPS Store or similar establishment for a more straightforward, albeit pricier, option. Simply inform the salesperson of your need to send a registered letter. They'll provide the necessary form and instructions, charging you the standard mailing fee plus a UPS Store service fee. If insurance is desired, ensure it's requested. Submit the letter and form to the salesperson for processing and receipt issuance.