LetterStream Mailing Barcodes
Getting Started
LetterStream uses various types of barcodes on mail pieces to improve mailing speed, accuracy, and traceability. These barcodes serve distinct purposes and are automatically added to documents where applicable—they cannot be removed.
In This Article
Certified Mail Barcode
Every certified mail item sent via LetterStream includes a Certified Mail barcode and tracking number.
- Purpose: Enables USPS to provide real-time status updates and delivery confirmation.
- Visibility: Clearly printed to be viewed through the windowed envelope of certified mail pieces.
2D Barcode
A small 2D barcode appears next to the recipient address on nearly every mail piece.
- Purpose: LetterStream use only—speeds up processing and improves mailing accuracy.
- Additional Info: May be accompanied by light gray tracking numbers, which can also appear in the upper-left or right-hand side of each printed sheet.
- Note: The preview shown in your proof will reflect where these items are placed.
IMB (Intelligent Mail Barcode)
The IMB is a USPS-provided barcode used for sorting mail efficiently.
- Purpose: Facilitates faster delivery through automated USPS routing.
- Appearance: Located either above or below the recipient address.
- Current Use: Not applied to all mail types yet but will be increasingly used going forward.
If you have any question regarding barcodes, feel free to reach out to LetterStream Support for more information!