Special Occasions Cards for Birthdays, to show Sympathy or just to say Thank You! Receiving a Special Greeting Card in the Mail will put a smile on their face. Everyone loves to be surprised when they find something special in their mail. Choose from stock sentiments or write your own. Make sure they know you care with these special occasion cards. Improve your customer relations by sending promotional special occasion cards that builds lasting business and personal relationship. Show employees that you appreciate them and you will boost loyalty and morale. Remember an anniversary date or birthday date of your employees or clients.