situation:
a= Registered owner
b= Second owner
c= Me
d=Buyer
A sold his car to B with notarized deed of sale.
B sold his car to C with open deed of sale with the amount indicated
C sold his car to D but D wants to be the second owner and the amount changed.

Available docs are dos of A to B, photocopies of Id’s with signature of A and B. photocopy of id with signature of D.
D has already signed on open dos.
Now pwede kaya gawin yung gusto ni D? only C is available personally.
Thanks po please enlighten me.