Sign in to your My Verizon account.
Navigate: Menu (located in the upper-left) > My Plans & Services > Manage Products & Apps > Manage Your Products > from the Verizon Cloud section, tap Access My Cloud.
Tap the Menu icon.
Tap the Search icon (the magnifying glass).
In the 'Search Contacts' field enter the identifying info of the duplicate contacts (i.e., name, phone number, email address, etc.) then tap the Magnifying glass.
Select the duplicate contact then tap the Delete icon (the trash can).
Contact is selected when a check mark is present.