No, it is not true. If it ever worked, it does not work now. Some unscrupulous credit repair groups started that myth and continue to give this advice, for a fee, to people who want to repair their credit.
The best way to handle an item which you truly believe is in error on your credit report is to gather evidence that supports your theory. Present all the evidence and a written explanation of why you believe the item is in error. Cooperate with the credit bureau investigator, which means primarily being honest. Lying on a dispute with the credit bureau does not help your case, it just makes everything you say and present suspect.
Once a decision is made, ask what you can do if you do not believe the decision is correct. Depending on the dispute, credit bureaus may assign a second investigator or supervisor to review the dispute file. If the decision remains against you, ask the credit bureau if you can post a document on your credit report that explains your side to anyone reading the report.