Q: I can not receive shared photo stream notifications

Hello hayley204,

Thanks for using Apple Support Communities.

I understand you are not being prompted for invites to a Shared Photo Stream.  Please see the following information:

I opted out of receiving iCloud Photo Sharing invitations, but now I'd like to subscribe to shared photo streams.

If you still have an email invitation, open it and click “Don't Send Me Photo Stream Emails” at the bottom of the message. A browser window will open and show that you're no longer receiving photo stream invitations. Click “Undo this change.”

If you no longer have an invitation, contact Apple Support and ask to opt back in to receiving photo stream invitations. After you opt in, you won't receive previous invitations automatically, but you can contact the owner of a shared stream and ask to be invited again.

iCloud: Troubleshooting iCloud Photo Sharing and Shared Photo Streams

http://support.apple.com/kb/TS4379

Take care,

Alex H.