Thank You For Thank You for Birthday Card
Dear {Recipient},
Thank you for the lovely birthday card you sent me. I was so happy when I opened my mailbox and saw the little {color} envelope sitting inside. As much as I enjoy using the Internet, you know I still love getting physical cards and letters in the mail.
Thank you for remembering me on my {age} birthday even if we {haven't seen each other for a while/live far away from each other}. Your thoughtfulness really warms my heart. Take care always!
Best,
{Your Name}