(a) Salamah bin Alqamah (may Allah have mercy on him) says: I asked Muhammad bin Sirin (may Allah have mercy on him): Is there a tashahhud in the prostrations of forgetfulness? He said: I did not hear it in the hadith of Abu Hurayrah (may Allah be pleased with him), but reciting the tashahhud is preferable to me.
(b) Imam al-Bukhari (may Allah have mercy on him) says: Anas (may Allah be pleased with him) and al-Hasan (may Allah have mercy on him) gave the salam and did not recite the tashahhud.
(c) Qatadah (may Allah have mercy on him) states that one should not recite the tashahhud.
(d) Imam al-Bayhaqi (may Allah have mercy on him) says: The authentic reports on this matter indicate that even when he performed the prostrations after the salam, he did not recite the tashahhud for them. And success is from Allah.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 3899