Dyfed-Powys Police is investigating the theft of heating oil from a property in the Hassel Square area of Llanfair Caereinion between January 14-18.
This is the second time this has happened in recent months.
Police are asking anyone with any information, or witnessing the theft to contact the Police on 101 [within Dyfed Powys area] 01267 226 020 [outside of the area], or Crimestoppers anonymously on 0800 555 111.