Thank you for reaching out to Constant Contact API Developer Support.
Since troubleshooting this requires us to dig into individual cases, please email us at webservices(at)constantcontact.com with the following information:
- API Key
- Constant Contact username
Once we have this, we can look into why the contact may not be in your list.
Please let us know if you have any other questions!
Tier II API Support Engineer
View API documentation, code samples, get your API key.Visit Page
Join our list to be notified of new features and updates to our V3 API.Sign Up