1. Log in to your Merchant Center and navigate to the "Contacts" tab
2. If you would like to download your entire contact list, skip to step 5. If you would like to download a list of your contacts based on what Campaigns they have received, the Source or date of their upload, their subscription Status, or one of your segmented contact Lists, click "Show filters" next to the search bar
3. Change the gray drop-down menu that appears to your desired filter type and adjust the drop-down options that appear in purple text to the right to build your filter
4. Click the purple "Filter" button to the right
5. Scroll to the bottom of the page and click "Download CSV" below the last contact listed
You will be prompted to save the file to your computer.