Ownership of a plot
My grandparents bought a plot for 4 at a Catholic cemetery in 1980. They are buried in 2 Graves, my Aunt in another. I want to take ownership of the 4th grave. My grandparents two other children are willing to sign over their rights to me. My grandparents had only 4 grandchildren....me and my 3 brothers. 2 of my brothers are willing to sign over their rights. My one brother is deceased and has been cremated, with his ashes in the custody of his ex wife. He has two daughters, both adults who have no interest in having their fathers remains in the grave in question, and would have no problem signing their rights over to me. However, the cemetery says that unless my brothers ashes are disposed of, with documented proof, I can''t take ownership of the plot, and that his heirs can't waive his right to be interred in the cemetery. The cemetery suggested coordinating with a funeral home or ships captain and have them certify the ashes were disposed of, but wouldn't give me actual advice on an acceptable document. My sister in law may agree to sign an affidavit that she disposed of his ashes, but doesnt want to do any more than that. It feels like a bizarre catch-22 where no one will end up in that grave. Where do I go from here.
Edit: The plot is in Delaware and the ashes of my brother are in Washington State