Mailing evidenceUSPS acceptance event
Certificate of Mailing
CaseMail generates a Certificate of Mailing for all postage classes after USPS accepts the processed mail, tying the mailing event back to the CMID-stamped document.
PROOF & MAILING RECORDS
Certificates of Mailing
Document what was mailed and when USPS accepted it. CaseMail generates a Certificate of Mailing for all postage classes after USPS accepts the processed mail, keeping the certificate connected to the mailed document through its CaseMail ID (CMID).
What was mailedUSPS acceptanceCMID-linked record
ONE CONNECTED MAILING RECORD
Document what was mailed and when.
A CaseMail Certificate of Mailing provides evidence of what was mailed and when the mailpiece was presented for mailing. It is generated after USPS accepts the processed mail and stays connected to the CMID-stamped document and mailing record.
CMIDConnects the exact mailed document to its CaseMail mailing history and associated certificate record.
Certificate of Mailing
What is a CaseMail Certificate of Mailing?
A CaseMail Certificate of Mailing provides evidence of what was mailed and when the mailpiece was presented for mailing. It is generated after USPS accepts the processed mail and stays connected to the CMID-stamped document and mailing record.
USPS acceptance
A CaseMail Certificate of Mailing provides evidence of what was mailed and when the mailpiece was presented for mailing. It is generated after USPS accepts the processed mail and stays connected to the CMID-stamped document and mailing record.
Connected to the mailed document
The CMID keeps the certificate associated with the document and the CaseMail mailing record.
CMID
Mailing and delivery are separate events. Each certificate documents its part of the same CMID-linked mailing record.
3M+CaseMail certificate experience
Over 3 million certificates generated and presented across all U.S. jurisdictions.
WHY THE RECORD MATTERS
Keep proof of mailing connected to the document.
When you need to document a mailing, the certificate connects the USPS acceptance event with the document that was sent. Keep that evidence together for later review, sharing, or verification.
HOW THE CASEMAIL RECORD COMES TOGETHER
How your Certificate of Mailing is created.
A CaseMail Certificate of Mailing provides evidence of what was mailed and when the mailpiece was presented for mailing. It is generated after USPS accepts the processed mail and stays connected to the CMID-stamped document and mailing record.
Mailed document + CMID
Identify the document that was sent.
USPS acceptance
Record when USPS accepts the processed mail.
Certificate of Mailing
Keep the certificate with the mailing record.
View the four steps in detail
01
Document submitted
Upload or submit the document through CaseMail.
02
CMID assigned
CaseMail time-stamps the document and assigns its unique CaseMail ID.
03
USPS accepts the mailing
USPS acceptance becomes part of the mailing record.
04
Certificate of Mailing created
CaseMail generates the certificate for all postage classes and keeps it associated with the CMID-stamped document.
WHAT STAYS CONNECTED
What stays with your Certificate of Mailing.
The value of the CaseMail record is the relationship between the mailed content and the postal events that follow it.
Mailed document
The document associated with the postal transaction is tied to the record through its CMID.
CaseMail ID (CMID)
The unique identifier connects the exact document to its mailing history and associated certificates.
Certificate of Mailing
The CaseMail-generated record associated with the USPS acceptance event.
Downloadable record package
Authorized users can download the complete package or individual certificates in PDF format.
HOW THE CASEMAIL ID WORKS
The CMID connects the document to the mailing history behind it.
The unique CaseMail ID connects your Certificate of Mailing to the exact mailed document and its mailing history. It keeps the certificate associated with the communication it documents.
CMID
The practical difference: the record does not stop at “a tracking number existed.” It maintains the relationship between the tracking/mailing events and the document that was actually sent.
LONG-TERM RECORD INTEGRITY
Built to keep certificate records verifiable over time.
CaseMail uses blockchain technology as an additional integrity layer for certificate and mailing-record verification. Relevant record hashes and references are cryptographically anchored so later changes can be detected and the integrity of the record can be checked over time.
Blockchain-strengthened record integrity.
Blockchain adds an integrity layer to the certificate and mailing record, helping make later changes detectable and supporting verification over time.
ACCESS & VERIFICATION
Download, share, and verify the certificate record.
Authorized users can access the certificate package from their CaseMail account, download the full package or individual certificates as PDFs, print them, and share downloaded copies. Third parties can use the CaseMail verification page to confirm that a certificate is authentic and has not been altered.
WHEN THE RECORD MATTERS
Keep the communication and itsmailing history together.
Certificates and connected records can support business, legal, compliance, and notice matters where teams need organized documentation of what was mailed and the USPS information associated with it.
Important correspondence
Keep the mailed document and its mailing history together instead of maintaining separate copies, receipts, and tracking records.
Time-sensitive notices
Maintain the mailing event and later delivery-status information in one connected record when timing is important to the matter.
Multi-recipient records
Maintain individual mailing records and related certificates when a notice or communication is sent to multiple recipients.
COMMON QUESTIONS
Certificates of Mailing FAQs
Learn when your certificate is created, what it documents, and how to access or verify it.
What is a CaseMail Certificate of Mailing?
A CaseMail Certificate of Mailing provides evidence of what was mailed and when the mailpiece was presented for mailing. It stays associated with the CMID-stamped document and mailing record.
When is a Certificate of Mailing created?
CaseMail generates a Certificate of Mailing after USPS accepts the processed mail.
Which postage classes receive a Certificate of Mailing?
CaseMail generates a Certificate of Mailing for all postage classes after USPS acceptance.
Does a Certificate of Mailing document delivery?
The Certificate of Mailing documents the mailing event. A separate Certificate of Delivery connects USPS proof of delivery information to the record for Certified Mail, Priority Mail, or Priority Mail Express when USPS provides that information.
How does the CMID connect the certificate to the document?
The unique CaseMail ID connects the mailed document with its mailing history and Certificate of Mailing.
Can I download or verify my Certificate of Mailing?
Authorized users can download the certificate as a PDF, print it, and share downloaded copies. Third parties can use CaseMail’s certificate verification page to check authenticity and integrity.
CERTIFIED POSTAL MAIL
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