Affidavit for Secondary Evidence for filing i-485

[johnyS]

Doe the affidavit to be used as secondary evidence of Date of Birth for I-485 need be notarized?

Thanks for your help in advance

[johnyS]

We are applying for GC. My wife is the primary applicant. Her Birth Certificate does not have her name on it. She has her School certificate which mentions the DOB and her father's name. We are planing to submit affidavits from her father and mother as secondary evidence along with the school certificate...