§ 11. Acknowledgment or proof of instrument. When the execution of any instrument or writing is authorized or required by law to be acknowledged, or to be proven so as to entitle it to be filed or recorded in a public office, the acknowledgment may be taken or the proof made before any officer then and there authorized to take the acknowledgment or proof of the execution of a deed of real property to entitle it to be recorded in a county clerk's office, and shall be made and certified in the same manner as such acknowledgment or proof of such deed.