You added a wonderful point! Closing with the reader in control of the next action is a terrible way to end a sales letter. In all my client letters, I add a call to action for the letter’s author (presumably the person who signs the letter) to follow-up with the addressee. The follow-up increases the addressee’s response to the letter’s call to action severalfold.

Related, the same mistake is often made when leaving a voice mail. “Call me back when you get chance” is the easiest message to never return.

Thanks again for the kind reference.