I'm still getting letters and statements from my creditors
Some of your creditors will still send you statements to show you how much of your debt is still outstanding. You don't need to worry about these. Some creditors will continue to send statements to comply with the Consumer Credit Act but you don't need to pay them anything.
The statements may show that interest is being applied to your debt. This is because your creditor doesn't have to stop your interest and charges even when your DRO has been approved. This won't have any effect on your DRO finishing after the 12 month moratorium period, or your debts being written off.
Most creditors will add interest and charges to your account in case your DRO is cancelled during the 12 month moratorium period. This means that if your DRO is cancelled for any reason you'll need to repay the debt plus any interest or charges they've added.
My debts been sold to a collection agency
Some creditors may pass your debt to a collection agency during your moratorium period. The collection agency that gets your debt probably won't be aware that you have a DRO.
The Insolvency Service DRO Team at the Insolvency Service won't write to the new creditor to let them know you have a DRO. You'll need to let this new company know and you can do this by sending them a copy of your approval letter as proof that the debt is included in your DRO.