Who is responsible for paying the bill?
There's one Council Tax bill for each home. Usually the person living in the property has to pay the bill. Spouses and partners who live together are both responsible for paying the bill.
The person at the top or nearest to the top of the following list has to pay the bill:
• lives in the property and owns it
• lives in the property and has a lease (this includes 'assured tenants' under the Housing Act 198

• lives in the property and is a 'statutory' or 'secure' tenant
• lives in the property and isn't a tenant but has permission to live there
• lives in the property (for example a squatter)
• has a lease of six months or more on the property, but doesn't live there
• owns the property but doesn't live there
You can't be responsible for paying the bill if you're under age 18.
If you're still unsure about who is responsible for paying the bill, you can contact your local council and they'll be able to help.
When a property is empty
If a property is empty, the person normally responsible for paying may qualify for exemption or a discount. You can find more information about discounts and exemptions in sections 10 to 13 of the leaflet 'Council Tax - a guide to your bill' (you'll find this in the 'More useful links' section below).
The links below will let you enter details of where you live and then take you to your local council’s website where you can find out more or apply online.
so your dads main q's to the council should be.. WHY will you not chase the tenants?, and have you applied the discount to the empty homes?
the line i like is "
The person at the top or nearest to the top of the following list has to pay the bill:" even squatters come before you dad..
(direct gov link)
Council Tax - who pays and how much : Directgov - Home and community