I think you mean writing in third person - that is writing the story using "he/she/they" rather than "I".
Under US Copyright legislation, it is illegal to use a third party's name, image, likeness or trademark for your own profit, without their specific consent. Thus, when writing a piece that contains references to a third party source, you should seek the consent of that (third) party before publication.
A third party check is a check which is signed over to an individual not named on the front of the check as either the maker (entity writing the check) or the payee (to whom the check is payable). The payee signs the check over to another individual, who is the "third party."
The plural of third party is third parties.
Third party inspection companies | Third party inspection services
Let's ask a disinterested third party. Maybe the third party will be more fun, tonight.
I would be first party, you would be second party, he or she would be third party.
An independent third party is simply called an independent party. This is typically a political party that does not affiliate with the republican or democratic side.
Third Party
The Green Party is a third party and was formed in the US
Are third party exemptions froze?
the third party dies down
Third Force Party was created in 1979.