I generally have not had success with Fall planted potatoes. I have tried it perhaps 4 or 5 times but no longer do it. I will sometimes get a few volunteers in the Fall from potatoes that were missed from digging the Spring planted ones and collectively may get a few lbs yield from those if the first freeze is late enough. Other than hilling up once they don't typically get much nurturing. YMMV as your climate is a bit cooler than mine.

I havent tried it but in my location, as tempting as it is, I dont think it will work. I think my tubers would rot or grow in january when we tend to get a warm spell, followed by a february hard frost. This makes certain fruit trees difficult too.

But, in my area, I typiclly have a long mild fall, so can do 2 crops of potatoes, the last planted july or august

Upon rereading the original post I think I may have misunderstood. If by Fall planted it is meant planted in the Fall to overwinter for harvest the next year such as is done with "Winter wheat", this sounds like a totally bad idea for my climate and I think by extension, yours.

Fall planting of potatoes is probably worth a try, especially if you have some that have green spots or are trying to sprout on you and can't eat anyway. Your location and the potato variety will undoubtedly influence your success rate. I've planted potatoes in January as a "give it a try", figuring if they didn't make it, I could replant at the more normal time for my area (St. Patrick's Day). That was a year with a January warm spell and then freezes and snow in February but the potatoes did fine and I was harvesting potatoes in early MAY. They, of course, wouldn't keep at that point and had to be eaten quickly, so if you do try fall planted potatoes, don't plant more than you can eat or give away. Spring planting/Fall harvesting gives me a few months of decent (passive) storage. But even with a good root cellar, in my climate (USDA 8b) potatoes want to sprout in the early Spring. As to volunteers, I have a policy of zero tolerance. Potatoes should not be grown year over year on the same ground and that is exactly what a volunteer is doing. You really do need to rotate them around to different beds to avoid a build-up of potato destroying pests and diseases. Think of your garden beds as little ecosystems; if you bring in a bunch of fat, tasty spuds, all those things that eat fat, tasty spuds are going to have a population explosion... kind of like fossil fuels and humans but on a smaller scale!