Family Visit Visa

Hello everyone, just a quick couple of questions, would be very grateful for any help.

Firstly, I have recently acquired a property and this is the property I will be inviting my family member to, I have included evidences that I own this property. However as my bank statements and payslips arrive to my old(my parents) address I am wondering if this will be a problem? I have explained in the sponsor letter that I have recently acquired this property so am in the process of moving all my mail to my new address.

Secondly, will I need a solicitor to confirm that the person who has written the sponsor letter is the same person as the in the copy of my passport?

Hope this makes sense.

Many thanks in advance