Well, I'll tell you how. You just sign and keep quiet.
5 seconds sound clip from the Mr. Topaze (1961) movie soundboard.
You can hear this line at 01:02:02 in the Blu-ray version of the movie.
Quote context
[...]
- I give you my word of honour that you can truly render me great services. Can't he?
- Really on your word of honour?
- I trust you like my own brother. There!
- How can I show my gratitude to you?
- Well, I'll tell you how. You just sign and keep quiet.
- Yes, in business the first lesson one learns is discretion.
- Well, now sign, and underneath your name you put Managing Director.
[...]