In the association world, it is not uncommon for a company record and a person record to share the same email address, and even in some trade associations multiple members share the same email address.

Email marketing platforms that integrate with Novi, Mailchimp and Constant Contact, will not allow the same email address into the same list for more than one record. 

Therefore, Mailchimp and Constant Contact will accept only one record from a Novi group, and only that record will appear in the email marketing platform's contacts listing during the sync.

If an individual shares an email with a company, the individual will always win in this situation. Novi groups are centered around the idea that you're never emailing a company (imagine a building trying to check its email, ha!) but that you're emailing a contact at a company.

If two or more people share the same email address, Novi will sync based on priority of the person, until their subscription status changes (they unsubscribe, are removed from the Novi group, etc.). Learn how Novi assigns priority of which email address "wins."

Notice in the Mailchimp screenshot above that the company record (ABC Company) last name is blank. First/Last name are both sent in all cases, but last name is simply blank if it is a company.

Notice in the Constant Contact screenshot above that the company record (Abaco Key) Name is blank. People records use the Company field as their parent company while Company Records use the Company field as the company's name.

As an admin, you will want to clean up the underlying data and actively encourage members to use their own individual email address upon signup. 

A simple way to check if your group has duplicates is to sort your Novi group members by email address. This will alphabetize the list by email, revealing any records with the same email addresses. You could also download the list and use the Excel function to highlight duplicates in the email column.