My daughter is very unstable and several years ago when my grandson was six she got into some trouble and someone called child protective services on her. Child protective services brought my grandson to me. They gave me rules to follow regarding my daughter. She could not call or come over or have any contact with my grandson at all. I followed the rules to the letter for fear that my grandson might be taken away from me. My daughter was furious with me and went to court and made up lies that caused my grandson to be taken out of my home and put into a foster home. From the time he was born he was always in my home. My daughter would pick him up for a few days and bring him back, then we wouldn't see her again for weeks of months. He has never been away form me in his life and it was very tramatic for him. I had no contact with him at all. My daughter strightened up her act when she realized what she had caused and was able to get her son back after almost a year. When he was returned, again I have been the major caregiver, but my daughter has taken more responsibility for his care. Still she is not mother material and really doesn't want to be a mother. I still have my grandson 4 to 5 days a week. Today six days since shes picked him up she called me and said she was in some kind of trouble and wanted me to find out how she can sign over custody to me because she was afraid that child protective service might try to take him away again. He is now 11 years old and it would be devasting if he had to go through that again. What does my daughter need to sign to give me custody of my grandson. She is willing to do whatever needs to be done to make sure he is not taken away from me again. Can someone tell me how to proceed as fast as possible. The last time this happened I felt so helpless because everyone I spoke with told me I had no rights. He was kidnapped from my home by child protective services. I can't let that happen to him again. Desperate Garanmother! :(

He was kidnapped from your home because your daughter likely made up lies about you and was being spiteful. I think you need to remember that.
As for your question, sounds like you should petition to become the child's legal guardian. Since your daughter supports that, there should be no problems that way.
CPS can come in anytime if the child is in danger, so there is no real way to prevent that except to make sure things are done properly at all times and even then, I suggest being careful about your daughter and her maybe being jealous of your relationship with her child.

she will also need the father's permission, she cant sign custody over to you without it. he has more rights to the child then you do
No, she will only need the father's permission if the father is the LEGAL father with rights. If paternity was never established and the father never sued for custody/visitation rights he has no rights. Period. Obviously, if the grandmother was awarded custody to begin with, the fahter is not an issue.