If you do not already have the deeds to your house, you can get them from this link: https://eservices.landregistry.gov.uk/www/wps/portal/!ut/p/b1/04_SjzS0tDQwMTIxMjLXj9CPykssy0xPLMnMz0vMAfGjzOKNjSxMDA1NjDwsjM3MDTxN3dyNDUNMjQ1MjPWDU_P0c6McFQH3SLFU/
they cost 3 pounds. Once you have the deeds, you will see whose name they are registered in and the date of that registration (2005). You can then ask the land registry to send you a copy of the transfer deed from that date which will be the one which move the property from your father sole name to joint names.
You will then be able to look at the signature to see whether resembles your fathers.
As this was 12 years ago it may be that he can’t remember although if the property was in his name, he would have had to go to see a solicitor to submit the application (unless he was legally aware which seems unlikely from what you have said) so you also need to know from the land registry who submitted that application back in 2005. If it was solicitors, then go back to those solicitors but if it was this individual, then it becomes a police matter because it’s fraud.
With regard to what your father was told about changing his will, that if he wanted to change his will they would have to contact her is not correct. He can do what he likes with his will and she does not have to be contacted.
If she is not named on the deeds but she has lived with him for a considerable number of years and contributed to the property during that time (not just paying rent but actually contributing to the fabric of the house) she may have a financial claim against the house which I think is what the solicitors referring to but that’s nothing to do with his will.
Can I clarify anything else for you?
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