Onlar peşin ödemek zorunda. - They have to pay in advance.
Onlar peşin ödemek zorunda.
They have to pay in advance.
Peşin ödemek zorundasın. - You have to pay in advance.
Peşin ödemek zorundasın.
You have to pay in advance.
The half of it will be paid upfront, and the rest later on.