Below is an article from Wickr Support about verifying users through the Wickr system in case a user has their account reset or you want to add a second layer of security to make sure you are talking to the right person.
Here is the error you may sometimes get:
“Unverified Users The following users are currently not able to chat due to their security changing. Please contact your moderator to verify them now.”
https://support.wickr.com/hc/en-us/articles/115005092548-Security-Verification