Is Sujud-ul-Sahw (Prostration of Forgetfulness) considered as a Salah (prayer), which starts with the Takbir ("Allahu Akbar [Allah is the Greatest]") and ends with the Taslim (salutation of peace ending the Prayer)? What is the Du`a' (supplication) that is said in the Sujud-ul-Tilawah (Prostration of Recitation)?
Sujud-ul-Sahw is considered as a Salah. You should say Takbir each time you prostrate and rise from the Sujud (prostration) and end it by saying the Taslim, as is confirmed in the Sahih (authentic) Sunnah (whatever is reported from the Prophet) (Part No. 7; Page No. 127) of the Messenger of Allah (peace be upon him). You should say what you usually say when prostrating in Salah when performing the Sujud-ul-Sahw and the Sujud-ul-Tilawah, according to the general meanings of the Hadith related on this subject.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.