The phrase "official receiver" refers to a person appointed by the government to manage the financial affairs of someone who is bankrupt. They help ensure that the person's assets are used to repay debts to their creditors. Full definition
If you don't cooperate with official receiver, for example by not giving information they need or trying to hide assets, a court can stop you being discharged. (stepchange.org)
If your restrictions are to be extended then you will be notified by your trustee or official receiver who is taking care of your bankruptcy case. (moneyexpert.com)
Alternatively, you can search the register by visiting your local official receiver's office. (nationaldebtline.org)