Here's the fun part. The cash/cheque option is available if it was involuntary. But the option only has to be available, usually you have to ask for it. Not

Here's the fun part. The cash/cheque option is available if it was involuntary. But the option only has to be available, usually you have to ask for it. Not telling you that option exists is legit, telling you that option doesn't exist isn't. But if it was voluntary, the monetary option is not mandated. So when they ask if anyone wants to volunteer for a voucher, accepting that offer is volunteering, and writing yourself out of the cash option. (The airline can still offer it, but they no longer have to offer it).