If I have a temporary guardianship form signed and notarized in one state, can I use it in another state?

The form would be valid, but?I don't know whether you actually have guardianship, I assume, of your grandchild. I can't speak to Indiana law, so I am not sure exactly what you actually have. If the child is here in Ohio, I would suggest that your daughter execute either a grandparents power of attorney, or that you actually apply for a formal guardianship through the courts here. Again, I do not know what the form is that you received so I can not really give you an exact answer.