hi there! just wanna give u an advice... your wife needs to attend the cfo seminar first before applying for a change of name on her passport. i applied at manila dfa last month but they didnt accept my application because i dont have yet my cfo cert. i also asked them about the cfo stamp they told me to go back to their office to get the stamp when i get the visa.
i followed one of the advice here on when and how to apply for change of name and when to attend a cfo seminar but unfortunately dfa has change some of their requirements without updating their site