Certified Mail made simple.
Certified Mail® coversheets and labels, complete with digital postage, can be printed at home or work, in the mailroom, or high-volume mail processing facility. Generate the coversheets and labels individually, in batches, or automatically via our REST API. It’s the perfect solution whether you’re mailing one, 100, or 100,000 pieces. All you need is Internet access, a printer, plain paper and our free Certified Mail window envelopes (#10, 6” x 9”, 9” x 12”), or Certified Mail specific labels (5” x 8.5”) if you are sending Certified Mail in Flats or Boxes.
Step 1: Enter or import address
Enter the recipient’s address, select from the built-in address book or upload an Excel file to send hundreds – or thousands – in a batch. We’ll verify each address to reduce delivery problems. Add the item ID and reference to match with the letter content being mailed.
Step 2: Print Certified Mail coversheets and labels, complete with digital postage
Print Certified Mail coversheets from any standard printer, complete with digital postage. Simply fold the cover sheets, along with your letter, and insert them into the Certified Mail window envelopes we supply. For Certified Mail sent via Flats and Boxes, simply print on the SL-200 Certified Mail labels we provide.
Step 3: Send it
Simply drop your items into any mailbox or leave them for your mail carrier to pick them up. A Proof of Acceptance (Electronic) for each mail piece is posted to your account within hours. No more time-consuming trips to the Post Office and no more need for PS3800 Receipts, Scan Forms, Firm Books or Manifests.
SimpleCertifiedMail.com is Built for B2B high-volume mailers (automation + control)
If you send Certified Mail at scale, the real problem isn’t “how do I mail one letter?” It’s how to send 100 to 100,000 pieces with consistent tracking, proof, reporting, and accountability.
SimpleCertifiedMail is designed for that workflow:
1) Batch sending for speed
- Upload a spreadsheet to generate large volumes in minutes
- Print in batches (instead of preparing every piece manually)
- Reduce human error with standardized formatting
2) REST API for end-to-end automation
- Create Certified Mail pieces directly from your systems (CRM, billing, compliance, legal ops, case management)
- Automatically capture and store the tracking number per record
- Pull status updates and write proof of mailing/proof files back into your system of record
3) Centralized proof + audit trail (the enterprise requirement)
- Store proof artifacts in one place for consistent retrieval
- Maintain long-term access to mailing records for audits, disputes, and compliance
- Avoid "receipt hunting" across desks, scans, and shared drives
4) Cost controls + reporting for large teams
- Use cost codes to allocate spend by department, client, location, or case
- Export reports for finance reconciliation, rebilling, and margin tracking
- Standardize Certified Mail as a measurable operational process
Common B2B use cases:
- Legal Documents (notices, demands, compliance mailings)
- Payment collections and billing disputes
- HR communications requiring proof
- Regulated notifications where proof of mailing and delivery matter
SimpleCertifiedMail keeps the USPS Certified Mail process intact—but removes the manual labor and creates an automatic, searchable record of tracking number, delivery confirmation, and proof of mailing at scale.
Can I do Certified Mail online?
Yes. With SimpleCertifiedMail.com, you can send a certified letter online without standing in line at the Post Office, handwriting a PS Form 3800, or manually filing paper receipts. The Certified Mail process still uses USPS Certified Mail, but SimpleCertifiedMail moves the preparation, postage, tracking, proof, and recordkeeping into an online certified mail workflow.
Here’s how it works: enter or import the recipient’s address, choose the Certified Mail services you need, print your Certified Mail coversheet or label with digital postage, and mail it from your office, mailroom, mailbox, or carrier pickup. You can send one certified letter or generate hundreds or thousands in a batch.
Online certified mail is especially useful when you need proof that a notice, legal document, billing letter, compliance mailing, or other important correspondence was mailed and tracked. Each mailpiece gets a USPS tracking number, and your account stores the proof records tied to that mailing.
You can also add Return Receipt service when you need signature confirmation from the recipient. Instead of waiting for a paper green card, an Electronic Return Receipt gives you digital proof of delivery with the recipient’s signature. That makes it easier to retrieve, download, print, or share proof when you need it later.
If the mailing requires tighter delivery control, you can also use Restricted Delivery so the certified letter is delivered only to the named recipient or an authorized agent. Delivery timing depends on USPS processing, destination, mail class, and business days, but your online account keeps the tracking and proof records organized from the time USPS accepts the mailpiece through delivery or attempted delivery.
For businesses, the main advantage is operational control. SimpleCertifiedMail.com lets teams avoid manual Post Office workflows, reduce paper handling, centralize proof, track costs, and maintain searchable Certified Mail records for audits, disputes, compliance, legal, HR, billing, and regulated communications.
Sign up today and order envelopes. You’ll have them in just a few days.
Electronic Proof of Acceptance, Delivery and Return Receipt replace manual methods.
The Proof of Acceptance Electronic PDF is recognized by the IRS, state tax agencies, state, and federal courts as prima facie evidence of USPS acceptance of your mail piece and is posted to your account soon after your letter receives its first outbound scan.
The Return Receipt Electronic PDF has the same legal status as the PS3811 Green Card and is posted to your account with hours of the Mail Carrier receiving the recipient’s signature.
The Proof of Delivery Electronic PDF is posted just as quickly, for mail pieces not requiring a signature.
Ten-Year Record of all your transactions and USPS Proofs.
All of these PDFs are stored in your account for ten years and can be printed or downloaded at any time, making them easy to submit to courts and distribute as necessary.
Easier to Track Costs and Seek Reimbursement from Clients.
With the cost code features, it’s easy to allocate mailing costs to internal departments or speed up reimbursement from clients with detailed reports. Easily download expenses in Microsoft® Excel format for sorting, analysis, and allocation to specific jobs or clients.