Can an 82 year old with Alzhiemers be taken to court if she does not pay a credit card debt which is over 4 year old?

The short answer is yes. However it is much more complicated. In the case of an incomptent person's finances, where there is no a Power of Attorney or legal guardian order the court takes over. The procedure can be simple or very complexed depending on the state of residency and other contributing factors. The state statutes regarding this issue can be reviewed for specifics. Please email me if you feel I can be of assistance.