The first 20 characters of the IMB's are used for matching the scan to the mailpiece.
For details about IMB tracing / matching criteria in EngageOne Delivery Audit (formerly known as Mail360 Data Manager), refer IMb Tracing User Guide. Topic is 'IMb Tracing™ Mailpiece Scan Data Record Format'.
For details about IMB tracing / matching criteria in EngageOne Delivery Audit (formerly known as Mail360 Data Manager), refer IMb Tracing User Guide. Topic is 'IMb Tracing™ Mailpiece Scan Data Record Format'.
UPDATED:
September 22, 2017