My suggestion is simple a way to block a payee from sending you money.
Support staff can block a payee from sending you money if you contact them however why not make it so anyone can do it themselves through the app. I have known people to be in a situation where they have blocked somebody on everything and that person will transfer them £0.01, using the notes as a form to contact them.
Let’s make it simple, you can delete a payee why can’t you block them? If the support staff can do it surely its easy to implement. It could simply sit with the delete payee button.
May be a silly question but what happens to these funds that are transferred as part a payment when a block is enforced, do they just bounce back to the sender?
I can see how to block Monzo contacts if they appear in my Recent or Favourites lists, but if I click on a regular Monzo contact in the overall list, it just brings up Pay and Request.