Have two cats, a cat flap and they both have litter trays which are always clean. One of the cats ( we think about 14 yrs, we have had them 10) keeps pooing on the kids bath mat, if it isn't there, then their blankets, bed or clothes. It also regularly wees on their clothes if they leave them on the floor.
Dc are 6.5 and 3.5 ... But we moved here nearly a year ago and it only started then.
Taken them to vets for check up and nothing wrong with them. Was looking at feliway but that won't work in whole house. They are locked in kitchen over night, but the next step will have o be keeping them in there all the time, but that doesn't seem fair on other cat, but the cat flap is in there so he couldn't get out otherwise.