NZ sponsorship visitor visa evidence

Hey team,

Anyone gone through the process of sponsoring someone for their visitor visa?

Im sponsoring my partner to come to NZ to 30 days.

I am a NZ citizen. I have the following stamped by the JP. Proof of bank. Proof of identity ( passport). She wouldnt stamp my proof of funds and proof of address ( title) as i don't have the originals.

she did mention that, possibly it doesn't need to be certified by a JP.

Does anyone know if the proof of bank + house title need to be stamped, certified by a Justice of peace.

Thanks team