The green card nobody reads
A certification card is a flat green field of condensed capitals that everyone has seen a thousand times and nobody has ever looked at. That's what makes it funny to wear.

A flat green field. White condensed capitals, all of them, in a block. A rule above, a rule below, a small seal at the bottom.
You have seen this thing hundreds of times. You have never once read it.
Why is a certification card a good print?
Because it's maximum familiarity with zero attention.
Every cinema audience in the world has stared at this card while waiting for something to start. The colour, the type and the rhythm are burned in — and because nobody actually reads it, the words can say anything at all and it still registers as the real thing for about two seconds.
That two-second delay is the whole joke, and it's a better joke than anything printed on the shirt could be on its own.
What makes it look official?
Flat colour, condensed gothic, and no design at all.
There's no illustration, no hierarchy beyond size, no attempt to be attractive. Solid field, tight all-caps block, hairline rules. It reads as institutional precisely because somebody decided not to make any decisions.
That restraint is hard to imitate deliberately — the instinct is always to improve it, and improving it destroys it. Same discipline as a plain number with nothing helping it.
Can I use a real ratings board?
This is the one place in this bucket where the answer is a flat no rather than a licence.
National certification bodies own their names, their emblems and in several countries their card designs — but the reason to leave them alone isn't ownership. Those marks carry a legal meaning: they certify that an actual authority reviewed something. Reproducing one isn't a style reference, it's a false claim wearing a familiar coat, and nobody will license you to make it.
An invented body solves it completely and is funnier. THE NATIONAL CINEMA BOARD OF STANDARDS
sounds more real than most real ones, and inventing the seal is the enjoyable part.
What should the copy say?
The original grammar, redirected.
The structure is fixed: the following [thing] has been approved for [audience] by [authority]. Keeping that skeleton and changing the nouns is where the whole format lives — approved for one specific person, for a particular household, for people who already know.
Resist adding a punchline at the end. The format is the punchline; a joke on top of it is one joke too many.
Does the colour have to be green?
Practically, yes — the green is doing the recognition.
That specific saturated green is what triggers the memory before a single word is read. Red is used for restricted material and reads differently, which is usable if that's the intent. Anything else loses the reference entirely.
It's an unusual case where the garment colour is the design rather than a backdrop to it.
Is it too niche?
It's the opposite — it's one of the broadest references in this bucket.
Painted poster traditions require somebody to know the genre. This card requires only having been to a cinema. It's a shared visual memory that crosses country, age and taste, which very few things do.
Does it print well?
It's almost the ideal fabric print.
One ink, flat, large condensed capitals, no detail below a certain size, no gradients, nothing to fill in. It reads at any distance and survives any wash. The seal is the only small element and it should be simplified rather than reproduced faithfully.
Deep green ground with white ink, or white ground with green ink for a version that reads as a proof sheet rather than a screen.
How do I get one made?
Describe the card at JustOG — what's being approved, for whom, and what the invented authority is called. Pick a direction, drag the crop frame, see it composited on the real garment, and it's made to order and shipped.
Designs other people have published are in the shop.
Approved for all audiences by nobody in particular.