The consent of a creditor must be accompanied with his affidavit, stating as follows:
Where a consenting creditor is an executor, administrator, trustee, receiver, or assignee, he may state the necessary facts, in his affidavit, upon information and belief, setting forth therein the grounds of his belief; but in that case, the consent must also be accompanied with the affidavit of the insolvent, to the effect, that all the matters of fact stated in the affidavit of the consenting creditor, are true.
N.Y. Debt. and Cred. Law § 61