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    IMB Tracking - Catdi Printing
    Real-Time Mail Tracking

    IMB Tracking

    Know When It's Delivered. Every Piece.

    Real-time USPS Intelligent Mail Barcode tracking so you know exactly when your mail is delivered — down to individual pieces.

    What Is IMB Tracking?

    The USPS Intelligent Mail Barcode (IMB) is a 65-bar barcode that encodes the mailer ID, mail class, and a unique piece ID for each mail piece. USPS scanning equipment reads these barcodes at automated processing facilities, generating scan events that are made available through USPS Business Customer Gateway APIs. Catdi Printing uses these APIs to provide you with real-time delivery tracking reports.

    Intelligent Mail Barcode (IMB) tracking gives mailers real-time visibility into where their mail pieces are in the USPS processing stream. Catdi Printing applies unique IMB barcodes to your mail pieces and provides access to USPS tracking data — showing you when each piece was accepted, processed, and delivered to the mail carrier for final delivery.

    Key Benefits

    Why Catdi Printing clients choose IMB Tracking as part of their mail production workflow.

    Real-Time USPS Scan Events

    See when each mail piece was accepted at the USPS plant, processed through distribution, and dispatched for delivery.

    Campaign Timing Intelligence

    Know exactly when your mail is hitting mailboxes — coordinate call center staffing, email follow-ups, and promotions accordingly.

    Piece-Level Tracking

    For advanced campaigns, track individual pieces by recipient — know who received their mail and when.

    Automation Rate Qualification

    IMB barcodes are required for USPS automation postage discounts. Every barcoded piece saves you money on postage.

    Informed Delivery Integration

    IMB tracking powers USPS Informed Delivery — recipients get email previews of their incoming mail the day before delivery.

    Delivery Proof for Compliance

    USPS scan data serves as documented proof of mailing and delivery for legal, compliance, and audit purposes.

    Who Uses IMB Tracking?

    Common applications and industries that rely on imb tracking as part of their direct mail workflow.

    Time-Sensitive Promotions

    Know precisely when your sale or event postcards arrive so you can launch coordinated email and social campaigns.

    Political & Advocacy Mail

    Track voter contact mail delivery to coordinate phone banking and canvassing activities by delivery date.

    Compliance Mailings

    Use USPS scan data as documented proof of delivery for legal notices, insurance cancellations, and regulatory mailings.

    Multi-Touch Campaign Coordination

    Trigger email or digital ad retargeting to coincide with physical mail delivery events.

    Call Center Coordination

    Ramp up inbound call center capacity on the days your mail arrives based on IMB delivery data.

    Campaign Analytics

    Correlate mail delivery dates with response spikes to attribute conversions accurately to your direct mail spend.

    Ready to Add IMB Tracking to Your Campaign?

    Catdi Printing handles every step of your mail production in-house. Get a custom quote today.

    Frequently Asked Questions

    IMB stands for Intelligent Mail Barcode. It is the current USPS standard barcode for letter and flat mail, replacing the older POSTNET and PLANET barcode systems. The IMB encodes the mailer ID, mail class, routing ZIP code, and a unique piece identifier in a single 65-bar barcode.
    IMB tracking provides USPS scan events at key points in the mail processing journey: acceptance at the originating USPS facility, processing through distribution centers, arrival at the destination delivery unit, and dispatch to the carrier for final delivery. It does not provide confirmed doorstep delivery scan (unlike package tracking).
    Catdi Printing provides tracking data through a campaign dashboard or CSV delivery reports based on your preference. Data is updated as USPS scans occur — typically within 24 hours of each processing event.
    Yes. USPS automation rates — which are significantly lower than non-automation rates — require an Intelligent Mail Barcode. Every piece we address at Catdi Printing receives an IMB barcode, ensuring you automatically qualify for the best available postage rates.
    Yes, with the right marketing automation setup. Our IMB tracking data can be connected via API to email platforms (Klaviyo, Mailchimp, HubSpot, etc.) or digital ad platforms to trigger follow-up communications when your mail is delivered to specific ZIP codes or recipients.