Philadelphia`s real estate transfer tax is three percent of the calculated value of the property. A written collaboration or partnership agreement is recommended to address these issues before problems arise. If the authors who write separately (i.e. no team), share the qualifying credit, each screenwriter shares the rights to the entire story and screenplay. For example, if two authors share the „story by“ credit, neither author owns the exclusive rights to what they have written on their own. The authors share the rights to the entire property, and therefore the reserved rights must be exploited jointly.