Someone takes on a much larger role, with more scope and often more staff, while title, authority, and pay stay where they were, on an implied promise that recognition will follow.
An example
When the studio director of an architecture firm left, the principal in charge asked a senior project architect to take over the studio's three hospital projects and its eleven staff, saying this was how people got noticed for associate principal. The project architect's title, salary band, and approval limits stayed the same. At the next one-on-one, the project architect asked about the title and was told it felt transactional to bring that up so soon. A year in, the studio was on schedule and the project architect was working sixty hours a week. Human resources records still listed the eleven staff under the departed director. A colleague mentioned that the last person to run the studio that way had burned out and left after two years without the title. The project architect asked for a target promotion date in writing.
Why it works
Accepting looks better because the person asking attaches developmental and status meaning to it: you were picked because you are ready, this is how people get noticed. Asking for the title or pay first looks worse, recast as transactional or as not understanding how things work. Refusing is costlier, with the threat of being flagged as low potential and the opportunity handed to a more pliant peer. Since nothing changes on paper, the person has no procedural foothold to negotiate from. It works on people with a striver identity, constrained mobility, opaque promotion criteria, and no peers to compare notes with.
The thinking behind it
George A. Akerlof George Akerlof's The Market for "Lemons": Quality Uncertainty and the Market Mechanism (1970) shows how a gap between what one side knows and what the other can check sets the terms of a deal. The manager knows whether the promised title will ever come; the person doing the larger job cannot check. A written promotion date, and a comparison with anyone who held the role with the title, turn the promise into something that can be verified.
Leon Festinger Leon Festinger's A Theory of Social Comparison Processes (1954) holds that people judge their situation by comparing themselves with similar others when there is no objective standard. An invisible promotion works best on someone with no peer to compare with, who cannot see that the scope they carry usually comes with a title and band. Finding a predecessor or peer in a comparable role supplies the comparison the arrangement depends on avoiding.
Warning signs
Scope and headcount have grown, but the job code, band, and title record are unchanged. Asking about the title gets called transactional. No target promotion date exists in writing. Human resources systems still show the work belonging to someone else. A predecessor in the same arrangement burned out or left without the title.
How to defend yourself
Before taking on the next piece, ask for three things in writing: a scope change that describes what you now own, a target promotion date, and a backfill plan for your old work.
Find out whether anyone held this role with the title, and what they were paid; that is your comparison. Document the scope as it grows. Set a date by which the promise has to be kept, and decide now what you will do if it is not, whether that means escalating to human resources, cutting back to your formal role, or taking an outside offer. An external offer in hand changes the conversation.
How a leader shuts it down
Have human resources audit job architecture regularly: compare actual scope and headcount with title and band, and flag mismatches older than six months. Put any promised promotion in writing with a date. When someone runs a role without its title, either give them the title or take the role back.