Ofgem also said that outstanding credit balances, including money owed to both existing and former Avro Energy customers will be honoured.
Domestic customers will also be protected by the energy price cap with Octopus Energy and energy supply will continue as normal, Ofgem added.
In a statement https://octopus.energy/press posted to its website, Octopus Energy said it is hoping to work with Avro's administrators "to make the process as seamless as possible"
Octopus also reassured customers that their energy supply will be maintained and money is safe.
Avro Energy, along with Green Supplier Limited, stopped trading last week, leaving more than 800,000 customers potentially facing higher bills, after a jump in natural gas prices pushed the sector to the brink.
(Reporting by Juby Babu in Bengaluru; Editing by Toby Chopra)