Okay guys i have seen this in SEA, and was in AikaOnline for a while too (im not brazilian, so do not know what they are called there) but i have seen people selling Aika Blank Cheques recently DO NOT BUY THEM they are usually in shops for up to 1m per but, and here is the important info
YOU CAN GO TO THE BLACKSMITH IN DISCOERA and use the shop THEY ARE JUST OVER 1K WORTH
Do not be scammed keep this in mind
hope it saves some people their hard earned gold