Follow a few simple steps to create a variety of invitation letters for your church using our free templates. We created three free templates you can use as a starting point.The deadline to request a Letter of Invitation is November 1st. Complete one form per attendee, and be sure to include all required information. An invitation letter from you. Complete the Invitation Letter form. Fill out the form with correct and sincere information about you, your guest, and the entry and departure date. The template is designed in both A4 and US letter sizes, accommodating international and domestic visa requirements. Complete the Invitation Letter form. Fill out the form with correct and sincere information about you, your guest, and the entry and departure date.