Formal Invitation Letter Sample 2016-08-16 | Lion Pick out the best formal invitation letter sample from our wide variety of printable templates you can freely customize to match any party theme. Also read: Joint Graduation Party Invitations Related posts:Angry Birds Birthday Invitation PrintsLaser Tag Party Invitation WordingProm Invitations BlankQuick And Easy InvitationsPrincess Invitation TemplatesSamantha Girl Bday Invitations