Principle
A manager who closes deals on behalf of their reps is not a commercial asset. They are a commercial liability wearing the costume of one. Co-Signing produces the appearance of management while systematically preventing the development of the rep capability the business needs to scale.
Behaviour
Co-Signing is the pattern in which a frontline sales manager responds to a struggling rep not by diagnosing and developing the specific capability gap, but by stepping into the deal personally and closing it themselves. The rep watches. The manager closes. The deal goes in the pipeline update as evidence the team is performing.
What is not happening is any development of the rep's underlying capability. The next deal the rep cannot close will also require the manager. The manager becomes a structural dependency rather than a development resource, running their own personal quota in addition to the overhead of nominally managing a team.
Co-Signing looks like commercial leadership. It is commercial dependency at a different level of seniority.
Evidence
The diagnostic is simple and fast. For each frontline manager, identify the three reps currently furthest below quota. Ask the manager to describe the specific operational gap of the lowest performer: not their attitude, not their pipeline volume, but the specific thing they do or fail to do in a customer conversation.
A manager who coaches gives an operationally specific answer immediately. A manager who Co-Signs gives a volume answer: "He needs more pipeline. I've been getting on calls with him to help move things forward."
The second signal: cross-reference every closed-won deal in the last twelve months against manager involvement records. In a Co-Signing organisation, a disproportionate share of closed deals will show manager participation in the final stages.
Psychology
Co-Signing persists because the organisation attributed the manager's prior success to individual talent, promoted them for it, and never equipped them with a different skill set for the new role.
A manager who was an excellent individual contributor has a professional identity built around solving commercial problems directly. Watching a rep struggle through a call and asking diagnostic questions rather than taking over is genuinely difficult when your entire prior career rewarded the opposite instinct. Most organisations provide no structured pathway for this transition.
Commercial Risk
Co-Signing compounds every other commercial problem simultaneously. It means Hero Dependency cannot be resolved because the management layer cannot build new heroes. It means Ramp Fiction will persist because no one can diagnose what a new hire is doing wrong in month three. It means attrition risk increases because reps who are never developed eventually leave.
For an investor who has acquired an asset to scale the commercial engine, a Co-Signing management layer is not a Year 2 problem. It is a Day 1 constraint. The plan requires the management tier to develop a larger team. The management tier cannot develop a team. The plan fails.
Investment Committee Note