Caller: claimed to be from the Do not call register

Caller said they were from "Do not call register" and said that I would no longer receive scam phone calls. The caller then asked to confirm my address so they could send through "details". He said an old address of mine and I refused to state new address. I suspect its the old "record you stating name, address, saying "yes" and "that's great" to use to steal identity".... I probably said more than I should have - best avoid completely.