Mini Case study: Getting the "YES" from your sponsor!

• You have a change proposal for the project you are working on.
• After a lot of thinking you put a proposal together and finally meet with the sponsor and she agreed with the change you proposed.
• She said go ahead and implement the changes.
• However, you know she is forgetful, and you wanted it to be documented.
• As a project manager what would be your technique to approach her to get her approval in writing so you can document it.