What is a Flickr Guest Pass?

Want to share private photos with friends and family without making them go through the signing up/ registration process to open a Flickr account? But now you can share those private photos with friends and family by creating a Guest Pass. You can enter up to 50 email address and choose whether you want the recipients to also have access to other friends and family photos in your photostreams. Guest passes work with secret links, you can share a link to some of your private photos or videos with just a special few, then disable the link whenever you want.