USPS Certified Mail: The Complete Guide for 2026
Everything you need to know about USPS certified mail: what it proves, costs as of January 2026, how to send it, tracking, return receipts, and when to use it.
Skip the post office. Upload a PDF — we print it, stamp it, and mail it via USPS. Most letters arrive in 1–5 business days (not guaranteed).

Learn about USPS services, pricing, and best practices for business mail.
Everything you need to know about USPS certified mail: what it proves, costs as of January 2026, how to send it, tracking, return receipts, and when to use it.
Current USPS EDDM postage rates for 2026, including Retail, BMEU, and nonprofit pricing. Plus total campaign cost breakdown with printing and preparation.
Everything small businesses need to know about USPS First-Class Mail, with pricing references aligned to rates as of January 2026.
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We process your order the same day, print it the next business day, and hand it off to USPS. Most letters arrive within 1–5 business days (not guaranteed).
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A letter on a kitchen counter gets read. It sits there until someone deals with it. Email gets archived, ignored, or auto-filtered. Physical mail doesn't.
My father spent his career in Albuquerque selling commercial mail systems to corporations like AT&T. Bus-sized machines that could print, fold, and stuff thousands of letters an hour. Corporations had automation. Small businesses had printers and a trip to the post office.
Thirty years later, that hasn't changed.
A friend of mine recently took over a dental practice in Chicago—two dentists, five employees, hundreds of patients. He wanted to introduce the practice to the neighborhood with simple letters instead of pouring money into Facebook ads. Something people would actually hold in their hands.
He couldn't find a way to do it. The tools he found were either built for enterprises or required him to become his own mailroom. He gave up. The letters never went out.
That gap—enterprise automation on one side, nothing on the other—shouldn't still exist. Postmarkr closes it.
Upload a PDF. Add an address. We print, stamp, and mail it via USPS. No minimums, no contracts, no learning curve. Just mail that gets delivered.
“If you've ever wanted to send something important but couldn't justify the time, you're exactly who we built this for.”
No subscriptions. No minimums. You pay for each letter you send.
8.5x11 letters via USPS First Class
Full-color postcards via USPS
USPS Certified Mail with proof of delivery
Every Door Direct Mail to entire postal routes
Encryption, automatic deletion, and zero human review — built into every step.
Your documents are encrypted using standard 256-bit SSL, the same technology used across modern web applications.
We delete your documents within 7 days of printing. We don't keep files around longer than we need to.
We never see or store your card details. Stripe handles all payment processing (PCI DSS compliant).
Your files are processed automatically by our printing system. No human ever views your content.
Every address validated against the official USPS database before printing.
We comply with GDPR and CCPA requirements. We don't sell your data or use it for anything other than printing and mailing your letters.
Read our full Privacy Policy and Terms of Service
Everything you need to know about sending mail with Postmarkr
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