Here in Taiwan businesses have to give a so called "fapiao", which is an invoice and a receipt in the same time. If another company wants to buy something from

Here in Taiwan businesses have to give a so called "fapiao", which is an invoice and a receipt in the same time. If another company wants to buy something from your company, you have to give them fapiao (since it's a 'invoice') and pay your taxes based on that to the government immediately (since it's a 'receipt' as well), even if you haven't received a dime yet. And since in its receipt capacity there's no other thing to issue to the company once they pay, they could pretty much just not pay and say "why would I have gotten a fapiao[receipt] if I haven't paid, dude?" It's just amazing how many truly stupid things keep being done with finance, and I'm puzzled about how could they be fixed.