No. Using the Home Contents Locker and providing this information to the Police or your insurance company won’t guarantee your claim is accepted or paid out. Your insurance company will still need to prove the claim is valid.
The Home Contents Locker is merely a helpful online tool to help you record the things you own.
It may even help you figure out just how much your other half has actually spent on guilty pleasures like cat ornaments, or baseball caps, over the past few years!