Formal Invitation Letter Templates 2016-08-25 | Lei Pick out the best formal invitation letter templates from our wide variety of printable templates you can freely customize to match any party theme. Also read: Surprise Birthday Invitation Wording Related posts:13th Birthday Invitation Wording SamplesMonster High Invitation BackgroundsExample Of A Spanish InvitationScary Halloween Party Invitation IdeasCars Birthday Invitation Cards DesignSleepover Invitation Lazer Tag