Can you sign off a letter with the following:
Dear Joe,
I appreciated the cake you sent me.
Thank you,
Bob
But doesn't the above sound like you're thanking yourself (Bob) instead of Joe? "Thank you, Bob"
Another one:
Dear Joe,
See you after the new year.
Merry Christmas,
Bob
Again, doesn't the above sound like you're saying merry Christmas to yourself (Bob) instead of Joe? "Merry Christmas, Bob"