Neobanks definitely have this feature. For example Revolut. There’s a “Block future payments” button, and once you click it, no more charges from that merchant will go through.

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amelius 2 days ago | parent | next [-]

Yes, but this is not a correct way to unsubscribe. They might for instance still send a bailiff to collect their money.

What I'm talking about is an official way to unsubscribe. One that the user fully controls, and is free of dark patterns.

	▲	robertlagrant a day ago \| parent [-]
		What if you want to change your subscription level, rather than unsubscribe?

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lixtra a day ago | parent | prev [-]

The requested feature is more like list-unsubscribe headers for mailing lists[1]. Instead of categorizing the mail as spam (blocking) you send a clean unsubscribe back to the sender.

[1] https://www.twilio.com/en-us/blog/insights/list-unsubscribe