Petition for mother - diff spelling of maiden name and no birth cert

[jetlagged 3]

Hello VJ,

 

I am planning to apply for my citizenship shortly after receiving my green card. Currently, I am waiting for the conditions to be removed. Anyhow, I am just trying to be proactive and prepare my mom's documents so when I become a US citizen I wont have any delay when I file petition for her. My dilemma is that my mom doesnt have birth certificate. She was born in Manila, Philippines. She has baptismal certificate and his last name is spelled as DAUS. She got married with my dad and changed last name into REYES but her maiden name in her marriage certificate is also DAUS. But on my birth certificate my mother's maiden name was spelled as DAUZ. So all my life I have used DAUZ as my middle name. Fast forward to now, I am already married to a US citizen and changed last name and my maiden name is REYES (my father's last name and my mom's when she got married). My question now is, when I file my petition I will be required to show my birth certificate and on the NVC level, my mom will be required to show civil documents like birth certificate (which she doesnt have) but she has baptismal and marriage certificate which are all in DAUS. If anyone from the Philippines had similar situation or any idea how to solve this problem? My mom is telling me something like late filing for her birth certificate but she will asked to show other docs which she can but are all in DAUS. So im thinking even if she did the late filing her birth certificate will still be DAUS different from my birth certificate. Should I be the one to ammend my birth certificate? Thank u so much in advance