I will try to keep this brief. I have been employed by a public sector organisation for over twenty years. Unfortunately during this time I had one major illness that result in a long absence. During the absence I went on nil pay having exhausted my entitlement to sick pay. I was due to return to work when an allegation was made (I hadn't submitted sick notes) that ultimately I was able to prove this wasn't the case but whilst the investigation was ongoing the organisation chose to put me on full pay. At the time they said , and I have it recorded, that this was them showing their duty of care. Now several years later they are claiming it was an overpayment and seeking to recover it. I would like to dispute this (they knowingly paid me / made a conscious decision so fail to see how it can be an overpayment), I dont know what the legal situation is and wondered if anyone has been through anything similar? Thank you