Hi Gumdrops,

Have the personality changes been brought to the attention of his GP or consultant? It may be related to his brain tumour & they may be able to help, especially if he is being verbally aggressive. Is the money he is spending from a joint account/savings/credit card? If so I suggest his partner speaks to the financial institution to try and get her name taken from the account to safeguard her future finances. If it's a joint named credit card the company may be able to put a temporary freeze on any future use. Also, seek advice from the Citizens Advice Bureau who may be able to suggest how to safeguard their finances.

A POA would be good, however he probably won't agree to it and it may be considered that he doesn't have the mental capacity anymore to agree with it. If a doctor can say his mental capacity is affected the partner could think about applying to the Court of Protection to be a Deputy so they can deal with his finances. Citizens Advice can explain this better.

If this behaviour isn't due to his brain tumour, but a wild fling that he wants before he dies, it may be better to speak to his closest friend (if he has one) and ask them if they can have a meaningful conversation with him about the effect it's having on the family he will be leaving behind. If there is no close friend then you could try and have a quiet, heartfelt discussion with him - ask him why he is buying these items and does he realise that he will be leaving his partner to survive with no financial help if he continues. 

I hope you & she manage to sort things out & please let us know how you get on,

Best wishes,

Angie