DO questions

So we sent ConocoPhillips a certified letter in regards to suspended funds in unclaimed property for oil and gas and mineral/royalties. They said it was in suspense because the addresses that my cousins and I were not updated? Funny thing is I have not received the return certification from post office. They emailed us instead? Then they sent a DO with 2 special clauses listed above, and one says owner requested division orders? What am I missing