New and improved Mail Transport Equipment (MTE)
It goes on to say, "New tubs have the Mail Transport Equipment (MTE) hotline number and email address on the equipment to report misuse. The change was made to encourage the return of flat tubs to Post Offices and to advise customers that MTE is not available for private use."
Replacing missing or misused MTE hurts the Postal Service’s bottom line. USPS will spend more than $120 million this fiscal year to replace missing and damaged MTE according to the post.
USPS encourages employees and others to report MTE that’s being misused, stored unnecessarily or located outside the postal network. Send leads and tips to HQMTE@usps.gov or call the MTE hotline at 866-330-3404.