An invoice serves several purposes for both the one writing the invoice and the one receiving it. What is interesting is how the idea of an invoice also factors into areas of leadership.
An invoice communicates information about services rendered and materials purchased.
An invoice serves as a point of reference for both parties and allows future access to all information.
An invoice also represents an agreement, contract, or commitment for each person identified.
If leaders communicate information (vision, goals, plans, etc.) as a point of reference, imagine the impact and commitment it would generate.