I won't repeat the basics of writing a letter. You can find a lot of helpful info on that here. (And just a reminder, if you are sending a letter internationally, you need an international stamp! [Or the equivalent postage.])
Who to write to:Don't feel like you need to write this minute. Give yourself a few days to reflect.
I usually say anytime within 2 weeks after the passing/funeral is acceptable. If you wanted to wait until the new pope is choosen, you could do that as well.
What to say:
Letters of condolences are best-kept brief, anywhere from a few lines to a page.
Things you might include in your letter:
- Your condolences to the person you are writing to
- How you felt when you hear the news
- Your feeling towards Pope Francis
- What did you admire most about him? his work?
- Share a favorite memory
- How will you remember him?
- What were his best strengths or characteristics?
- Did you ever get to meet/see him in person?
- Share a personal reflection or respectful comment about Pope Francis—his leadership, faith, humility, or global influence.
- Let them know they will be in your thoughts/prayers
There is an old, outdated rule that letters of condolences must be handwritten. This comes from a time when people learned beautiful penmanship and typewriters were a new invention. If you have nice handwriting, I would strongly encourage you to handwrite your note. It makes it more beautiful and personal.
But if you don't have nice handwriting, and a typed letter is actually going to look nicer and be easier to read, then feel free to type it.
I've sent both handwritten and typed letters of condolence in the past. I usually handwrite the note if it is only a few lines. And will type the note if it's longer.
I have written to the Vatican a few times over the years, including following the passing of the Pope Emeritus, Pope Benedict in 2022. I have never gotten a reply from the Vatican. But when Pope Benedict died, I did get a reply from the Apostolic Nunciature (Vatican Version of an Embassy) in my country. I will try to post that reply when I am back home. I'm currently away, so I don't have access to it.