Parliament sources said the resignations, tendered in July in protest against the delay in the creation of a separate Telangana state, was rejected because they were not in a proper format. Of the 12 MPs, eight belonged to Congress and two each from Telugu Desam Party and Telangana Rashtra Samithi.
The Congress MPs whose resignations were rejected by the Speaker are Ponnam Prabhakar, G S Reddy, M Jagannath, S Rajaiah, P Balram Nayak, G Vivekanand, Suresh Shetkar and Madhu Goud Yakshi.
The others whose resignation was rejected are TDP MPs, Ramesh Rathod and Namma Nageswara Rao, and TRS chief K Chandrashekar Rao and party MP Vijayashanti.