Would it be a violation of the Canons of Ethics for a lawyer to record a telephone conversation without advising the person conversing with him that a record is being made?
18 Baylor L. Rev. (1966)
WIRETAPPING - RECORDING TELEPHONE CONVERSATIONS
An attorney may record a telephone conversation without advising the person conversing with him that a record is being made.
The members of the committee are unanimously of the opinion that the above described conduct would not be a violation of the Canons of Ethics. (10-0)
Tex. Comm. On Professional Ethics, Op. 84 (1953)