The key in ghostwriting that maintains the secrecy of the actual writer

When writing that is written by a ghostwriter gets successful, it is expected from the writer to reveal his or her name to get the credit. In order to eliminate this possibility, there is a legal agreement signed between the hirer and the writer. This is one of the most alarming situations for the hirer that is why the influencers don’t consider that how much do ghost writers charge but they focus on hiring a professional ghostwriter who has experience in ghostwriting and can maintain the complexity of agreement that clearly mentions not to reveal their name. Do you think that it is a good method of maintaining the secrecy?