Courts insist with great strictness upon depositions being taken at the time and place designated in the commission, and some statutes fix a penalty to be paid to opposite side for failure to do so. When the taking of the depositions is commenced but not completed the day specified in the commission, for good cause in the certificate shown, the further taking may be continued by adjournments from day to day, until completed.

The attendance of witnesses is obtained by the subpoena of the commissioner or other officer before whom the depositions are to be taken.

The fact that a witness has been furnished in advance with a copy of the interrogatories, or has heard them read, may be shown on cross-examination as affecting the credibility of his testimony.

Where the witness had written out or prepared his answers in advance of the examination, the deposition should be suppressed.

The answers should be given and taken down in the presence of the officer and objections thereto noted, but the commissioner should not attempt to rule upon the relevancy, competency, or materiality of questions or answers.

The questions and answers should be read over to the witness after they are written down, and then the depositions should be signed by the witness in the presence of the officer, and the certificate should so state.