This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Here is an example of invitation letter:
                                                                                     Brgy. San Lorenzo
                                                                                 Valenzuela City 1143
                                                                                     November 8, 2014
              Dear Carla,
                   Do you know that in Saturday I will be celebrating my birthday?
              My eldest sister is giving an informal party to celebrate it. She ask
              me to invite my friends or classmates.
                   The party will be held at our home starting at three o'clock in the                       afternoon. I hope you will come. I'll be expecting you.

                                                                                               Your friend,

--Mizu <--(Don't copy this)