That’s really just the third step to ensure you don’t disappear into communication black hole. The first two are about channels of communication and an agreed failsafe.
Step 1: Agree the best channel for staying in touch throughout the process. “What’s the best way for me to stay in communication with you?”
Step 2: Agree the failsafe for when that channel isn’t working. “I feel sure this won’t happen, but with some clients I find myself disappearing into a communication black hole when I’ve sent a proposal over. If that happens what would you like me to do to get us back on track?” (Personal phone line perhaps?)
Step 3: Agree the clients actions on receipt of your proposal. “And you agree to review our proposal with your team before 16th July. Then we’ll have a telephone conference call at 10 on 17th July. Is that ok?”