Indian Succession Act, 1925
S. 63: Execution of wills- Requirements of a valid will – The attesting witness should speak not only about the testator’s signature or affixing his mark to the will but also that each of the witnesses had signed the will in the presence of the testator – execution must be proved by at least one attesting witness, if an attesting witness is alive. [Indian Evidence Act, 1872 , S . 68]