Because Mr. Boddy will bring to an end a certain long-standing, confidential, and painful financial liability. It is signed, A friend.

9 seconds sound clip from the Clue (1985) movie soundboard.

You can hear this line at 00:16:25.848 in the Blu-ray version of the movie.

Quote context

[...]

- What are they all doing here?

- Eating dinner.

- Do sit down, Mr. Boddy.

- Thanks.

- No, you can take that away, honey.

- Look! I demand to know what's going on. Now, why have we all been dragged out here to this horrible place?

- Well, I believe we all received a letter. My letter says, it will be to your advantage to be present on this date.

- Because Mr. Boddy will bring to an end a certain long-standing, confidential, and painful financial liability. It is signed, A friend.

- I received a similar letter.

- So did we. Didn't we?

- I also received a letter.

- No, thanks, Yvette. I just ate.

- Now how did you know her name?

- We know each other. Don't we, dear?

- Forgive my curiosity, Mr. Boddy, but did your letter say the same thing?

- No.

- I see.

[...]