Tracking events typically start appearing at earliest 3 mailing days after sending your API request (and in some cases can take longer). Please note that IMb scans are not guaranteed by USPS, but we do see scans on over 99% of our mailings.
Tracking events typically start appearing at earliest 3 mailing days after sending your API request (and in some cases can take longer). Please note that IMb scans are not guaranteed by USPS, but we do see scans on over 99% of our mailings.