The reason that the insurance company may deny a claim after a fire (or other complete loss to a home and the property inside) is because of the lack of proof. Very few homeowners take the time to inventory all of their possessions. After the disaster strikes it will become almost impossible to remember and record all of the property that was in the home.
A basic home inventory will help make filing a claim a simple task. There are a number of different routes to take and a homeowner should look at the way that is most convenient and most likely to be used.
There are workbooks on the market today that offer room by room sheets to list all of the furniture and belongings along with estimated prices. These books will often include pockets for including photos or receipts of purchase.
Many homeowners are turning to technology for their inventory. Companies are springing up all around that will come in to your home and video tape all of your belongings. They will then store a copy of the tape in their facilities (so that there is an extra copy available outside your dwelling).
It doesn't matter how the inventory is recorded. Just be sure to get a list of all of your property, belongs, furniture and items so that you can file a complete claim to the insurance company if you incur a complete loss.