Send a letter care of the florist. That'll reach him.
5 seconds sound clip from the Monsieur Verdoux movie soundboard.
You can hear this line at 01:31:59 in the Blu-ray version of the movie.
Quote context
[...]
- Always the same thing. Just two words: Please, please.
- I've never known such aggressiveness.
- That doesn't sound very aggressive. Whatever he wants, at least he's asking for it.
- Well, as long as he's not too old.
- But I don't know the man. And besides, I don't have his telephone number.
- Send a letter care of the florist. That'll reach him.
- Good morning, monsieur. A letter for you.
- Merci.
- Did you deliver the flowers?
- Oui, monsieur. The last went yesterday.
- Good. Then repeat the order for another two weeks.
- Oh, wait. You'd better cancel the order.
[...]