durable power of attorney I have been durable poa and medical poa for my mother…

durable power of attorney
I have been durable poa and medical poa for my mother since december 16, 2002. Since then mom had to be placed into a nursing home. Now some of the family members are furious. They haven’t helped or contacted mom for quite a while. Now they are trying to break the poa contract. I did notify most of my siblings. However, a few I did not contact in December. Now they say it is void. It was prepared by an attorney and recorded. Was it mandatory for me to send them a paper copy at the time I recorded it? Can that make it void?