Sayyed Mohammad Al-Musawi, Sayyed Mohammad al-Musawi is originally from Iraq and heads up the World Ahlul Bayt Islamic League in London. Other than being involved in various humanitarian projects, he frequently responds to... Answered 2 years ago

It depends on the nature of the mistake. Some mistakes do not invalidate the Salah, while other mistakes can invalidate the Salah. You may write some details so that I can understand the situation and try to reply your question.