Obviously you can go further: What if you just draw up the whole thing with a pencil? What if it's an ID identifying you as a citizen of Nowhereistan? Where does freedom of artistic expression end and a forgery start?
Again, IANAL, but I suppose it would qualify at least as fraud once you try to use even an obvious fake as "proof of identity" in place of a requested government issued document. In that case, there's an intent to deceive that's hard to deny, even if it's just about age verification for access to a digital platform.
I could imagine in court it might come down to details, like whether it's sufficiently similar to a real ID at a glance, or whether tamper-proof marks of an official ID were copied as well.
In any case I wouldn't want to risk up to a year of jail time over a joke.
> A document in the classic sense requires an embodied declaration of intent that identifies an issuer and is suitable for providing proof in legal transactions. In the case of a lawyer's letter, the signature is an essential part of the standard repertoire of authenticity.
https://www.heise.de/en/news/Document-fraud-via-email-Why-th...
So removing some parts to make it _could_ make it safe, to Not create a "risk of confusion":
> Even if computer processing creates the appearance of a genuine document, the typical characteristics of the original must be present to establish a serious risk of confusion. Likewise, the BayObLG did not consider the offense of forging evidential data according to Section 269 of the German Criminal Code (StGB) to be fulfilled.