Which of the following are included in unfair practices during debt practices?

[answerhappygod]

Which of the following are included in unfair practices during debt practices?

A. May collect only amount legally owed
B. Postdated checks a. May not solicit for purpose of instituting criminal action b. May not deposit before date on check c. If a check is postdated longer than 5 days, must notify consumer of deposit at least 3 days and no more than 10 days before depositing
C. May possibly communicate regarding a debt by postcard
D. May use any language or symbol other than collector's address on any envelope except debt collector may use business name if it does not indicate it is a debt collection business.