There is a special place in hell for people providing non copyable text information in the form of screenshots.

Modern life is full of these tiny inconveniences. It usually involves some sort of "smart" devices, like light switches, stoves, elevator buttons, etc. Each one of which could be forgivable, but in sum it's like death by a thousand paper cuts.

User hostile UI in the name of security is particularly bad: we are supposed to type unique and complicated passwords in text fields without being able to see what we type, and if we get it wrong, we are put in timeout for two seconds. Citrix Netscaler nowadays apparently wants to be extra secure and shows you the most generic error message if you have a typo in either your password or user name and just tells you to "try again later", so you do until you lock yourself out. It's madness.

It's amazing how many "little" things there are like this. Like I honestly can't remember the last time I filled out a form which required something like my country and I didn't have to scroll to find it. All the information's there to make a good guess. But this is just one example of a million. There's just too many papercuts.

The other day I wanted to send someone proof that a transaction has gone through. A screenshot would have been the obvious choice, but of course, my banking app wouldn't let me do it.

A screenshot would also be trivial to counterfeit. That being said, I am not aware of any banks that provide any actually tamper-proof, shareable transaction confirmations.

Why does a third party want to know the transaction occured?

These seems a bit like a scam. Why can't they ask the recevier?

I don't know about your bank/countries, but all of the banking apps in my country I've seen have 1. a "share account details" button that lets you easily paste your IBAN and other details in text form and 2. a "transaction receipt" button that saves a .pdf with the relevant details, that can be sent to the other part (although I agree with the other comment, this .pdf just like a screenshot can be easily spoofed)

At least in SEPA you have instant payment, which is even better than any proof of the start of the transaction.

Perhaps true, but some modern OSes (like macOS and iOS) allow you to copy text from screenshots. And since the text quality of screenshots is typically good, it works well.

Windows with power toys and android have it too.

The Penny supermarkt app on android disables both screenshots and text selection with the error that it is disabled by admin.

Do you prefer a voice message instead? /s

At this point you can just use google lens or something like that to copy text from images.

At least the days of those screenshot being pasted into a Microsoft Word document are mostly behind us now...

And PDF documents in image form. Usually scans of printed copies.

It is fine for historical documents, but doing today means you really want to piss people off. And by the way, PDF files support signatures, both handwritten and digital. There are ways other than printing a 100+ page document and scanning it just so that your signature shows up on a single one of these pages.

They literally had me photocopy the phone screen because of the same issue.

Two mirrors will make it allowed.

Why not copy it from the App?

I have checked all my mobile banking apps (3 czech, 1 slovak, 1 lithuanian bank) and all of them can copy my IBAN.