[sirinsidiator]

It is possible to add your own notifications provider in order to fake a notification.

I have played around with it a bit in the past, and managed to make a notification with accept and decline button.
The gist of it is that you need to subclass ZO_NotificationProvider and overwrite all the necessary methods.
I am not sure if this code still works, but maybe you can use it as a starting point:

local MyNotificationProvider = ZO_NotificationProvider:Subclass()
function MyNotificationProvider:New(notificationManager)
    local provider = ZO_NotificationProvider.New(self, notificationManager)
    provider.nextId = 1
    return provider
end
 
function MyNotificationProvider:GetNextId()
    local id = self.nextId
    self.nextId = id + 1
    return id
end
 
function MyNotificationProvider:AddNotification(data)
    if(data.id == nil) then
        local list = self.list
        data.id = self:GetNextId()
        list[data.id] = data
    else
        d("Cannot add a notification with an existing id.")
    end
end
 
function MyNotificationProvider:RemoveNotification(id)
    self.list[id] = nil
end
 
function MyNotificationProvider:Accept(data)
    self:RemoveNotification(data.id)
end
 
function MyNotificationProvider:Decline(data)
    self:RemoveNotification(data.id)
end
 
local myProvider = MyNotificationProvider:New(NOTIFICATIONS)
table.insert(NOTIFICATIONS.providers, myProvider)
 
myProvider:AddNotification( {
    "Hello World!"
    })