When to Take a Joker — and the One Teacher Who Says Wait
Almost everybody says take it the moment you can. One teacher gives a specific case for leaving it, and the case is good.
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A joker is sitting in somebody's exposure and you are holding the tile it stands for. The near-universal advice is to take it as soon as the rules let you. It is good advice, and it is not unanimous.
What the rules allow, first
None of what follows is about legality. The gate has three conditions and the order is the rule:
There is no limit on how many you take in one turn, and you may never go the other way: a joker cannot be pushed in to pull a natural tile out.
Whether the owner may refuse. We checked seven independent sources and not one of them addresses it — nobody asks and nobody answers. Every source describes redemption as something the redeemer does from "anyone's rack", which makes refusal look uncontemplated rather than permitted. That is an inference, so we are not going to state it as a rule.
The majority: take it
The reasoning for taking it is straightforward. A joker in your own hand is flexible in a way a natural tile is not; it can fill any pung or larger you end up needing. A joker sitting in somebody else's exposure is doing nothing for you at all, and it may not be there next turn — anybody holding the natural tile can take it.
The exception: Debbie Barnett's reverse threshold
Barnett, of MahjCon, names a case for leaving it where it is. Roughly:
An opponent has three exposures — so they are close — and the joker you want is their only one.
Redeeming it hands them a piece of information at the worst possible moment: the natural tile you give them tells them what you are collecting, while they are near enough to finish that knowing it is worth something.
The shape of the argument is worth noticing even if you disagree with the conclusion. A redemption is not a free action — it is a trade in which you give away a tile and what that tile implies about your hand. Most of the time the joker is worth more than the leak. Barnett is pointing at the situation where it might not be.
The thing that stays true either way
The joker you are looking at was exposed by somebody who could not find the natural tiles. That, by itself, is information you already have for free — and it is why exposing two jokers in one grouping is worse than exposing one. Elaine Sandberg makes that point separately, and it belongs with this one: where your jokers sit matters as much as how many you have.
If you win by redeeming a joker and finishing on the natural tile you got back, that counts as a self-pick — everybody pays double, because no discarder handed you anything. And a joker you were holding that somebody redeemed away still counts as jokerless if you win without one, provided you announce it.
Where this comes from
The three gate conditions, the absence of a per-turn limit, the ban on reverse redemption and the self-pick payment are confirmed by Tom Sloper's rules FAQ — citing the League's own rulebook — and by the American Mah-Jongg Association. That the jokerless bonus survives a joker being redeemed away, and must be announced, is Sloper's, stated in the League's terms.
"Take it whenever you can" is attributed to Sloper, Linda Fisher and I Love Mahj. The reverse threshold is Debbie Barnett's, of MahjCon. On whether the owner may refuse there is no published source either way — none of the seven we checked addresses it — and we say so rather than fill the gap.