Some people specifically wear new clothes on the last Friday of Ramadan (Al-Wida), and it is famous that no matter how many new clothes you wear on the last Friday, there will be no accountability for it. The answer to this is "Hatu burhanakum in kuntum sadiqin" (Meaning: If you are truthful in your statement, then provide proof) (Ahkam-e-I'tikaf 66).