Scope Documentation and wire frame will be required from your side

If you don't have wire frame then you can provide us paper sketch design for the system.
If any third party API integrate in the system, Then All third party APIs will be provided by client only.

For support your point of contact and project associate engineer we will be appointed for you.

Payment terms are Milestones wise mentioned in email discussion and in PO.
Our company do 100% payment refund if client is not satisfied with initial two days work, This counting will start from project starting date. But after 2 days and before 10th day of progress work, Client demands for the refund then company will refund only 50% of paid amount. Apart from these two conditions, Company doesn't refund any amount.