Hi @Kev,

There are a few ways to see what lists users are on:

• A quick way to spot check the users on the Contest list would be to click into their profiles and you will see the lists that they are on.
• You can create segments of anyone on Contest list AND anyone not on lists X,Y,Z to see who is not on multiple lists. 
• You can do the opposite of the last bullet point by creating a segment of anyone on Contest list AND anyone on lists X,Y,Z to see who is on multiple lists.

If you are worried about double emailing someone if they are on more than one list, this won’t be a problem. Klaviyo uses email address as the unique identifier. This means that if you send a campaign to multiple lists/segments and a user on more than one of those lists/segments, Klaviyo will recognize that and ensure that they only get the campaign once.

Also, depending on your use case, if you want to send a campaign to the Contest list but make sure to exclude users on that list if they are on lists X,Y,Z, you can create segments of anyone on lists X,Y,Z, and then exclude them when you go to set up the campaign. 

I hope this helps!

Julie

Thanks Julie!