If you were given a hallmark card that stated "congratulations" regarding your recent promotion?

Question

Is it protocol to send a "thank you" to the person who sent the congrats?

Answer 1

no

because then they send a thank you for the thank you and so it goes on.

you might send people who send you a birthday present a thank you, but not if they only send a card - same rules apply

Answer 2

It would be warranted to do so. They took the time to send you a vote of congrats, so acknowledge the thoughtfulness with a 'thanks'

Answer 3

Well be very happy and thankful with this economy crashing. Then thank whoever sentthe card and send them a card back and.

Then again make sure it is real and not some one playing a joke on you.