Attestation is a legal acknowledgement of the authenticity of a document and a verification that proper processes were followed. It is an act of witnessing the signing it to verify that it was properly signed by those bound by its contents. In simple words, an attestation is a third party recognition of a documented agreement's validity.
The definition of aforesaid is something that was talked about before already said, referred to or recited
Nulla Pena lege it is a Latin word which means no penalty without law it is a legal principle which requires that no one can be punished if he or she did any that act which are not prohibited under the law.