Chattel paper refers to a document used in secured transactions to sell property on credit while retaining some interest in the property.
Chattel property is personal property that can be moved around. Chattel property law is defined as any property that is not land or physical items that belong to the land. Chattel is movable goods and land cannot be moved. A house would not be considered chattel property because it is attached to the land.
Writing your own contracts is perfectly possible, and legal. But it's also an incredibly bad idea. There's two reasons for this: Property law is complicated. Because it's such a fundamental part of legislation, it's often lots and lots of different laws layered on top of each other.