This article explains how to send a birthday card on the Facebook platform. You can send a birthday card that is only visible to the recipient or a card that others can see and comment on. It also includes information on how to find card sellers through their Facebook pages.
Special Birthday Post for your Facebook Friends
It’s fun to send greeting cards to your friends directly from Facebook. Facebook has built-in animated cards for all occasions including birthdays, holidays, parties, relationships, celebrations, and friendships. You’ll find cards that are humorous, loving, sexy, funny, and edgy.
Here's how to send a birthday card that only your friend can see. (It's also possible to send a card that others can see and comment on.)
Go to your friend's Facebook profile to post a message just for that friend.