Somewhere in most consultancy agreements sits a confidentiality clause naming the client. It commits the firm to declaring the relationship on request, in writing, to whoever asks. It does not, by itself, disclose anything to Wikipedia, and the two documents get confused for the same thing more often than the rule would suggest.
The actual requirement is narrower and more specific than a contract clause. Wikimedia's Terms of Use, amended in 2014, oblige anyone editing for pay to disclose their employer, client, and affiliation through at least one of three channels: a statement on the editor's user page, a statement on the talk page of the article being edited, or a line in the edit summary that accompanies the edit itself. The list ends there. A services agreement sitting in a law firm's files isn't on it, however thorough its own disclosure clause is. Neither is an email to the Wikimedia Foundation's volunteer support queue, nor a verbal assurance offered to whoever happened to ask.
The gap makes more sense once the two documents are read as answering different questions. A contract settles who is allowed to know a relationship exists — typically a narrow circle of people already inside the arrangement. Wikipedia's Terms of Use settle whether a stranger, reading the article's history at the moment the edit lands, can find out who made it and why, without needing to ask anyone. A contract can satisfy the first question perfectly and the second not at all.
The requirement was never whether the relationship was disclosed somewhere. It was whether it was disclosed here, in one of three specific places, at the time the edit was made.
In practice, compliant editors tend to settle on the same combination. A standing statement on the user page covers every future edit without repeating the disclosure each time, since it names the employer and client once and stays visible on every contribution tied to that account. A dated note on the specific article's talk page adds something the user page can't: it puts the disclosure in front of exactly the editors who are about to read the sourcing. Some add the {{Connected contributor (paid)}} banner at the top of that talk page, which does the same job more visibly, for anyone who arrives at the article without first checking who wrote it.
Vague language rarely survives scrutiny either way. 'This account may occasionally edit for compensation' names no employer and no client, and a volunteer who checks it after the fact tends to read it as an attempt to satisfy the letter of the rule while avoiding what it was written to reveal. The Terms of Use ask for the employer, the client, and the affiliation — not an acknowledgment that a category called paid editing exists.
When a paid relationship surfaces later without any of the three statements on record, the private agreement behind it stops mattering. The account is treated as an undisclosed paid editor regardless of what the contract said, which is usually the first fact a sockpuppet investigation or a deletion nomination cites once it starts looking for a pattern. The confidentiality clause was written to protect the client relationship. Only the statement on Wikipedia protects the article.
