Follow a few simple steps to create a variety of invitation letters for your church using our free templates. These invitation letter templates are just a few of over 1,100 modifiable full-text letters within over 60 categories!A good church invitation letter should be warm, welcoming, and to the point. Sample Invitation Letter for a Church Event. Yes, it was a fundraising event, but it was really so much more. Greetings, I invite anyone interested, particularly men and altos to join the Hector Presbyterian Church choir for Christmas.