Visitor Visa , Sponsor's Documents Proof

[tali1]

I am sponsoring a non -eu family member on a visitor visa. I can't find it now (as it all seems to pages about students and employer sponsors) , but i read a valid driving licence or valid passport is fine for my ID proof.( repeat proof of sponor Id is the question here - not the visitor) However,a friend of mine insists it has to be a valid passport .Can someone clarify ,as my passport has expired and i am sure my drving licence will be sufficient category A proof

[Buenchico]

If you're completing this form
https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/751681/sponsorship-form.pdf
then it seems that you're simply required to prove that you live at the address shown. (See 'Note 1' at the foot of the first page).

If it's a different form that you're completing, please provide the reference number quoted on the form.