When the document clearly states it was ‘signed in the presence of, or before, a notary public’, you will need to use a notary public. This may include powers of attorney, affidavits, statutory declarations, and some property paperwork for use abroad. If the document does not state notary public, then a solicitor is also qualified to witness documents being signed.
Sample Power of Attorney for Notarisation
The following image is a sample of a power of attorney that specifically states in needs to be witnessed and signed by a Notary Public. In this instance, you should use a notary public and not a solicitor.

