Withdrawal request:

Is information for the publisher that he can provide an invoice to the ad server operators / should.

Advertiser billing

The billing of customers is a little different, because it assumes the set account type. 

Billing customers pre-paid

You have the option to your customers to create the type prepaid. Here is assumed prepayment. That is, the customer is sent a bill for charging your account over a certain amount about the system. Is the money arrived to book it (manual) on the customer's account (Customer list -> click on the account balance).

The client's campaigns are then settled daily and the converted amount deducted from the account. If the account to 0, all of the campaigns are stopped. The customer, the account must now re-charge (of course this also happened before already) If the campaigns were stopped, they need to be restarted.

Billing customers with post-paid account

For customers whose account is marked with the type of post-paid, the settlement of the campaigns is not automatically done, but it must be an invoice manually (either before or after the campaign). Unlike pre-paid customers, the customer does not have to be charged here. Therefore, the campaigns can not be stopped Due balance setting.