I have seen a list called the Sales Sins and decided, because of my pasison - the Telephone - to match it with a Phone Sin.
This one is important. The person you are talking to MUST know not only who you are but are you the right person they should be speaking with in sales, customer service or even at the receptionist point in an oganization.
In my workshops we talk about the use of the name in any phone conversation! It is as important as eye contact is to a face to face meeting - even more important.
SIN #1: Not being personally accountable. Don’t pass the buck somebody else in your firm; your customers want your personal skin in the game. Phone Sin: Not clearly giving your name and contact information.