Staple holes can provide evidence of page substation on a document. It is an aspect that is always carefully scrutinised by a forensic document examiner. The following illustration reveals different staple holes on page 1 compared to page 11. Note, the blue coloured staple holes on page 11 are not present on page 1. By way of a very brief explanation, the purple coloured staple holes on page 1 were caused by the staple that created the red coloured staple holes penetrating back through the page and are not associated with the blue coloured staple holes.