Refers to information that is documented on paper, not spoken or digital.

Physical Documents

Used when you want to confirm that something is formally recorded.

Proof of Agreement

Origins point to old times when writing was only in black ink on white paper.

Use this phrase to stress that something is not open to interpretation or debate.

Emphasizes situations where parties are not flexible or willing to alter arrangements.

Used to forewarn that rules or expectations are clearly set to prevent errors.