Usually, an instrument must be acknowledged after its execution and during the time the instrument is effective. However, time of acknowledgment is not material unless, there are specific statutory requirements. Acknowledgment of an instrument may be performed in a state or country other than that in which the acknowledging party resides or in which the affected property is located. A valid acknowledgment requires that the acknowledging person must personally appear before the officer for acknowledging the instrument and declare that s/he has executed the instrument. The acknowledging officer shall certify only when the person executing the acknowledging personally appears before the officer, and it has proven to the officer that the person appearing is the same individual who is described in, and who executed the instrument.