A deed is the legal document to record an interest in real property. This is distinguishable from a mortgage which directs who is financially responsible for payments on a loan secured by real property. It is possible to be on a deed or a mortgage but not both. To the extent you are transferring ownership of property, a new deed is needed to reflect the change. The deed will specify the grantor(s), the person(s) relinquishing ownership of the real property, as well as the grantee(s), the person(s) who are acquiring ownership of the real property. The deed also includes a very detailed description of the real property at issue. These descriptions are based on land records from surveys of the property or construction plans.
Your county office maintains records for all the deeds within their jurisdiction. A new deed should be recorded with the office to replace prior deed. It is common for the deed itself in to include a brief summary of the recent line of ownership as well as where prior deeds were recorded in terms of book and page number. There is usually a cost assessed to record a new deed set by the county based on the number of pages of the document and number of signatures. There may also be real estate transfer tax due depending on the relationship of the grantor and grantee and total fair market value of the property being transferred.