Verizon Wireless is planning a major audit of their employer discount plans to verify customers’ continued eligibility, according to a report in PhoneArena.

Commencing April 1, Verizon will begin contacting customers receiving corporate discounts through text messages, direct mail or e-mail requesting proof of their continued employment within 60 days. If validation is not received, the discounts, which range between 10-25 percent, will be automatically removed in July.

Customers will be able to revalidate over the phone, by mail with a copy of an employee ID badge, or through a renewal website that will likely require the customer to use an employer-provided e-mail address for verification.

With no serious corporate discount audit conducted by Verizon Wireless in the recent past and a major upheaval in employment since the Great Recession, the audit procedure will likely net Verizon millions in additional revenue after removing discounts customers are no longer entitled to receive.

[Update 3/7: Verizon Wireless’ Brenda Raney sent word Verizon does not consider a copy of an employee ID badge as proof of employment.]