I will also add that the same documents were requested from my husband (petitioner). My husband was married twice, the first marriage ended in an annulment (1969) and the second with the death of his partner (2008). He had termination certificates for both marriages, but we received an RFE because it was noticed that the 1969 certificate was missing some kind of signature. Due to an error 40 years ago, the entire procedure was suspended until the correction was made. Ultimately, we managed to explain it and even get the signature, but the situation was scary..