Letters sent as certified or registered do not receive the same scan events as regular First or Standard class mail. Instead, a carrier tracking number and link (retrievable via the Lob API or dashboard) will be assigned to your Certified/Registered mailing.
- Tracking numbers and links for letters sent with the Certified mail add-on will be available immediately following the API request. This tracking number can be used to track the mailer via the carrier’s website.
- Tracking numbers and links for letters sent with the Registered mail add-on will be available three (3) business days following the mailer’s send_date. This tracking number can be used to track the mailer via the carrier’s website.
Please note that letters and checks sent in the Test Environment will not receive a tracking number.