I need help..please 
I got my first stage approval and i put my daughter(minor) as non accompanying in my application.
i got an email from the embassy they were asking some documents from my daughter
Including the declaration from non accompanying parent that has to signed and and notarized by my
SHe wouldnt sign it for sure for she dont want my daughter to be with me.
My daughter is residing with my mother.
What are my options to send to immigration regarding the documents my ex wouldnt sign?
A letter of explanation ? Or a notrized that my mother is the legal guardian?

I got my first stage approval and i put my daughter(minor) as non accompanying in my application.
i got an email from the embassy they were asking some documents from my daughter
Including the declaration from non accompanying parent that has to signed and and notarized by my
SHe wouldnt sign it for sure for she dont want my daughter to be with me.
My daughter is residing with my mother.
What are my options to send to immigration regarding the documents my ex wouldnt sign?
A letter of explanation ? Or a notrized that my mother is the legal guardian?