My mom designated me POA in NY however my mom is in Florida and has developed dementia. I wish to bring her back to NY except she is with my sister in Florida whom refuses to send mom back. Is my POA effective in Florida?
Would your mom be living with you?
Does she live with your sister right now? Does your sister receive any money for caring for her?
If your mom is settled and comfortable with your sister, why would you want to further confuse her (with the dementia), by moving her?
Can you give a few more details?
As far as I know, a POA is good throughout the U.S.