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Knowledge Base Home aero-right API aero-right Why are contacts not added to my list when I use the listAddContacts method?

Why are contacts not added to my list when I use the listAddContacts method?

API Updated on August 7, 2018
Some of the common reasons why the contacts are not added to the list would be:
  • The contact has not clicked on the confirmation email. You can check this by clicking on the "Not Opted-in Yet" link in the contact listing
  • The contact could be in your Master Unsubscribe List
  • The contact could be already present in your list