It’s a sad time when your favorite coworker decides to leave! How selfish of them! Did they not think of the hole they’d leave behind? You may have originally thought of some sweet retirement messages for your coworker, but now you may just give them an earful!
All kidding aside, you want to have some heart-felt (or funny) sentiments and messages for that special person. Just signing your name to a group card? No way! Totally gauche. You’re better than that, and they deserve more.