I've just called them as I received a letter regarding a company trying to trace me about an occupational pension scheme. I called them and they checked DP by asking me whether I had lived at a certain previous address, and confirming my DOB with me. They also asked whether I had a OPS with AXA/Winterthur. They had received communication from AXA as the address they had on file for me was my previous address. I confirmed my new address and FTB said they would pass the information onto AXA so that they can update their records. They confirmed I needed to take no action and that AXA would be writing to me. I'm glad I called - I wouldn't want to lose out on the benefits of the many years of pension contributions with AXA!