08-30-2013 12:18 PM
Hi and Welcome to the Community!
Actually, you should not use any account but your own, that you create. But, from what you describe, it sounds like the prior owner did not properly complete the necessary steps they should take before selling. Refer:
Step 5 for Seller and Step 1 for Buyer each would remove the association between the BB and any accounts that belonged to a prior owner. However, even if you successfully do that and then create your own BBID for your use, you may still have other problems if the seller did not complete all of their other steps. Several of those Seller steps can only be completed by the actual account holder with a prior carrier that was activated on the device...and that would not be you.