What's an embargo? A news embargo or press embargo is a request or requirement by a source that the information or news provided by that source not be published until a certain date.
Yes, you can absolutely send out embargoed releases with pr.co. It works the same as how you would usually send out an article or release; however this time you'll schedule your emails to go out before the release will is published.
So, your workflow is as follows:
1. Write your release
Just write your release as you would typically do.
2. Schedule your release
Schedule your release for the time you want the release to be publicly available to everyone.
3. Add the emails prior to your release
Write the emails, and set the distribution date to the date and time on which you want the embargoed release to be sent out. So, the distribution date must be a date prior to the publish date.
4. Confirm the campaign
Once the release is confirmed, the emails with the embargoed release will go out at the selected time. When the recipients click on the link in the email, they'll be able to read the release, but there will be a massive red banner on the top of the release that states: "UNDER EMBARGO. DO NOT PUBLISH BEFORE: [publish date]"