Letter of Congratulations

Congratulations to one's friend (male)
Congratulations to one's friend (female)
Congratulations to their parents
Congratulations to a friend for his Marriage
Congratulations on the birth of a Baby (sample#1)
Congratulations on the birth of a Baby (sample#2)

Dinner Party ( formal invitation letter )
Dinner Party ( less formal invitation letter )
Dinner Party ( informal invitation letter )
Wedding Ceremony