The SA05A Justice of the Peace Stamp is a self-inking rubber stamp approximately 70mm x 34mm.
A self-inking stamp has an internal ink pad which transfers the ink to the rubber textplate each time you use it. Self-inking stamps are ideal when the required image is to be used repeatedly.
If you are registered with a middle name it should be on the stamp, your name has to appear how it is actually registered.
Excerpt from JP Handbook.
Please note there is no requirement for a location to be included on these general stamps. Vulnerable people at risk may not wish to disclose the locality of where the document was witnessed. Unless, the document specifically requires you to state or declare the location where the document was witnessed, you should refrain from including this.