11. Where the application is for the appointment of a new trustee or trustees the summons shall state the name, description and residence of every trustee proposed to be appointed and in addition to the affidavit referred to in rule 3 hereof shall be supported by an affidavit of the fitness of every such trustee together with his signed consent to act in the trust.. Such consent shall be in the form No. 2 in the Appendix hereto and the signature thereto shall be certified either by a Registrar of the Supreme Court or District Court or by a certifying officer.