My question involves estate proceedings in the state of: Arizona

My question involves an unclaimed funds check from my brother who died in 2006, my father was appointed conservator at that time ( he was essentially a sperm donor and I never should have allowed this, thats besides the point and I suppose irrelevant now, lol). Anyway, he is in a LTC facility with dementia.I sent the state comptroller documents that they requested and they released the check to me($4,000). They initially told me they wanted me to go through another probate but I explained to them that all our family is now deceased, which is true.They released the check payable to me as conservator of my my father which I have not attempted to become, nor do I want to.Simply, can I cash this check without worrying about some sort of legal repercussions? Thank you kindly.