A public officer is a person who is appointed or elected to serve in a government position. A CONSTABLE is a public officer who is responsible for maintaining law and order in a particular area. They are usually appointed by the local government and have the authority to make arrests and investigate crimes. A NOTARY is a public officer who is authorized to certify documents, administer oaths, and witness signatures. They are usually appointed by the state government and are responsible for ensuring that documents are legally binding.