Having an Enduring Power of Attorney in place is fine, but it doesn't help while the Donor is still capable and fully compos mentis. The EPOA has no impact until it comes into effect. In my case my mother who is in her nineties is at least as mentally alert as I am, if not more so and so there is no question of making her EPOA effective. That still leaves us with the problem of managing her money. In consultation with my siblings and my mother, I have online access to her bank accounts, state savings account etc using her credentials for over a decade. This allows me to manage the accounts, download statements, etc without having to add my name to her accounts. All regular bills are paid by DD and any incidentals are paid by me by online transfer. I also use online transfers to reimburse my siblings for any expenses they incur on behalf of my mother (groceries etc). And just like Marsha25 I track everything on a spreadsheet, which I reconcile weekly to the bank accounts. I also keep all downloaded statements, bills, invoices etc. all of which are sent to my mother's e-mail address which is redirected to me.
I provide my siblings with an annual update, and with their agreement I run any major decisions (reinvestments) past one of my brothers. I also offered them at the outset, copies of the spreadsheet on request and made it clear that they were free to hold me to account at an point, without fear of it being taken as a personal affront.
Incidentally, for anyone in a similar position, I also sorted out all the utilities/other service providers some years back, by sending them a letter signed by my mother, instructing them to deal with me on her behalf, and to answer all enquiries I raised and accept whatever instruction I give them. The letters were sent by registered post and I recorded the letters and the delivery receipts. That has saved an enormous amount of frustration when dealing with the likes of eir, virgin etc as I can step in anytime there is an issue. I have also registered her with the energy companies as Vulnerable/Special Services Customer, and registered myself as her Third Party Representative on their systems.
One other point; having all of my mothers utility bills redirected to me has another big advantage. She doesn't see them, and out of sight is out of mind. This really struck me last winter when she was rattling around in her big old house listening to Joe Duffy's whiners banging on about the cost of heating bills. I had the others warned to ask her every time they called "Is the heating on". We were able to lie though our teeth that the bills were very reasonable and that she should have the heat on as much as she wanted. Little did she know that one of the gas bills was almost €1,500. The same applied in the past to the phone bills; she used to look at them and say that she was using the phone too much and needed to cut back - it's one of her primary connections to the outside world and she is a woman of many and varied interests and the 2/3 hours a day she spends on the phone is hugely important for her mental wellness and self esteem. She again has no idea of the bills and is better off for it as it allows her to use the phone without giving the cost a second thought.
This has worked well for us for over 10 years. Not saying it's for everyone but it works well for us and leaves her free of the stress of managing her money.