IMI payment and fine

Another question which is baffling me at the moment. we sold our house in Sept 2015 and our accountant informed us that liability for payment of IMI  goes off  whoever owns the property at the end of Dec of that year ie Dec 2015. So sold in Sept 2015, will we be liable for that year or not ?. I know IMI is in arrears so we are  liable for year end Dec 2014 and expect a bill for that in March 2016  but are we liable for anymore after that. I have been informed by someone else who has just sold and was  informed by their lawyer  that you are liable up until the date you sign the deed which makes sense in a way , so sounds like  a bill in April 2016 and also a bill in April 2017 for us  then  as apparently  financas don't allow you to pay up your IMI  debt for the following year. If true how stupid is the system.  Does anyone know the true ins and outs of it cos I'm so confused. Any help/advice would be appreciated.

Norm55 wrote: Will this make it easier to pay IMI from UK .?

It is very easy to pay IMI from a Santander account -
After the login page you have numerous choices down the left hand side.
You need Pagamentos and within that section there's a sub section called Pagamentos Estado (Payments to State).
Simply enter the reference number on your IMI bill in the boxes given & the amount.
That's all there is to it

There are two other Banif branches in Albufeira that i know of, one by the local camera office and one opposite Little Britain near the bullring.       The letter says there is no action to take, all payments etc will continue.   

The only Santander Totta branch now listed for Albufeira on their website is this one :

Equipamentos: Multibanco, Cheques e Depósitos
Serviço de Caixa: Sim

The 'Edifício Rádio Solar' is by the traffic lights where the main road across town (Avenida dos Descobrimentos) crosses the 'strip', between there and the bullring.

The Santander branch that Cubsur details is on the main road halfway between The Strip crossroads and the bull ring. There used to be two branches, one either side of the road and opposite each other, there's only one now and it's the opposite side of the road to the bullring.