A's wife died leaving their 2 sons. Subsequently A marries another wife and he got 4 sons through his second wife. After few years, he along with the 1st son(major) of the 2nd wife (other 3 are minors) enters into a partition deed with the 2 sons through the 2nd wife and both parties enjoying their properties(as A-schedule and B-schedule). A dies subsequently without leaving a will. All the 4 sons (now major) of A through 2nd wife are ready to partition the A-schedule. Whether they have to get a Legal heir certificate or Succession certificate. From whom this certificate is to be obtained? What is the procedure? Who are all to be mentioned in this certificate?