Any one who thinks that "what happens in Vegas, stays in Vegas" should probably read Article 31 of the National Master Agreement they work under.
ARTICLE 31. GARNISHMENTS
In the event of notice to the Employer that a court order has been issued requiring the Employer to withhold a percentage of an employee’s wages to satisfy a garnishment, the Employer may take disciplinary action if the employee fails to satisfy such garnishment or wage assignment within a seventy-two (72) hour period after notice to the employee that the Employer is considering disciplinary action. However, the Employer may not discharge any employee by reason of the fact that his/her earnings have been subjected to garnishment or wage assignment for any one (1) indebtedness. An employee may be suspended by reason of the fact that his/her earnings have been subjected to garnishment or wage assignment for any one (1) indebtedness, but any such suspension must be for a fixed, stated period of time.
If the Employer is notified of three (3) garnishments or wage assignments for more than one (1) debt, irrespective of whether satisfied by the employee within a seventy-two (72) hour period, the employee may be subjected to discipline. However, the employee may not be discharged upon notice of a third (3rd) garnishment, under this provision, unless and until the Employer has actually begun withholding the employee’s wages on a second (2nd) debt. If the Employer has an established practice of discipline or discharge with a fewer number of garnishments or wage assignments, or impending garnishments or wage assignments, and if the employee fails to adjust the matter within the seventy-two (72) hour period, such past practice shall be applicable, provided it does not result in the discharge of an employee prior to the actual withholding of the employee’s wages for a second (2nd) debt.
A garnishment for child support or alimony shall not be considered a debt for purposes of discipline.
The Employer shall comply with federal, state and local law in enforcing the provisions of this Article. Discipline or discharge pursuant to this Article shall be reasonable and nondiscriminatory.
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Sounds like the matter should go to the UPS Legal Department.