How can I turn off Find My iPhone? I traded in my iPhone already.

How can I turn off Find My iPhone? I traded in my iPhone already.

Verizon Alert: Thanks for shipping your trade-in phone, your package is with the carrier now but we noticed that 'Find My iPhone' is still active on your old phone. To avoid losing your trade-in credit, it's important you disable the activation lock on your old phone at www.iCloud.com as soon as possible. For instructions, visit: go.vzw.com/AppleSupport and for help, visit: m.vzw.com/Contactus

[Edited by Moderator]