Skip the queue. Send official letters and legal notices online. Get automated CASS address validation, real-time tracking, and comprehensive PDF evidence packets instantly.
50,000+
Letters Sent
99.8%
CASS Accuracy
500+
Law Firms
JOHN DOE CORPORATION
1600 AMPHITHEATRE PKWY
MOUNTAIN VIEW, CA 94043-1351
Every recipient address runs through Coding Accuracy Support System (CASS) to verify physical deliverability before postage.
Everything you need to send, track, and document certified mail in one clean interface.
Download comprehensive PDF evidence packages containing signed certificates of mailing, real-time tracking logs, CASS verification details, and physical delivery signature confirmations.
Stay updated with immediate status changes. Receive push alerts, SMS, or webhooks the second mail changes state.
Autocorrect typos, fill missing ZIP codes, and standardize address lines to format perfectly according to USPS regulations.
Upload lists containing thousands of recipients. Our engine parses the fields, CASS verifies each entry, calculates pricing, and routes orders in parallel.
Three simple steps to secure, official correspondence and tracking.
Upload your PDF or image and enter the recipient's address. We verify it's deliverable via CASS.
We print, postmark, and send via USPS Certified Mail with Return Receipt. Track in real-time.
Download your Evidence Packet with USPS delivery proof, tracking timeline, and signature.
All plans include printing, tracking, and postage. No monthly fees.
“The automated evidence packets save us hours of manual work and provide perfect documentation for our case files.”
Partner, Martinez & Associates
“Real-time tracking and automatic notifications mean we always know exactly where our certified mail is.”
Operations Manager, TechCorp
“No more trips to the post office. ProofPost handles everything digitally at a price that makes sense.”
Solo Practitioner, Patel Law