assalamualaikum doston mein karachi uni mein admition ke liye gaya thah tho unho ne kaha ek payorder banwa kar laayein ye kiya hota ha or kese banwate hein plz koi dost jaldi explain kare kiya ye normally check book se hota he jo har bank customer ke paas hota hai ya kuch karna hai plz koi better way mein samjha de i am wetin.