Fiduciary's Deed: Signature and Acknowledgment
Deeds and Conveyances: Special Rules Regarding Fiduciaries
When one executes a deed as trustee, or as executor, or in any other representative capacity, the fact that he so executes it should be stated in the body of the deed, and, if so stated there, there is no occasion for the addition of the word "trustee," or similar word, to his signature or to the mention of his name in the certificate of acknowledgment." Swaim, Crocker's Notes on Common Forms(Seventh Edition), §354.
"When one acknowledges a deed which he has executed in a representative capacity (for instance as "trustee" or "executor") there is no reason for inserting any reference to that fact in the certificate of acknowledgment but it is usual to do so." Swaim, Crocker's Notes on Common Forms(Seventh Edition), §398.