The Billing and Usage schedules for an order or asset line item change when you perform one or more of the following actions between the billing cycle. 

• Increase the net price of the asset.
• Decrease the net price of the asset.
• Extend the End Date.
• Shorten the End Date.
• Change the Billing Frequency.

You cannot perform ammendments on an asset with negative price list.

Creating Redundant Billing Schedules

When you amend an asset and the outstanding value for the amended asset is same as the original one, Conga Billing cancels out the resulting Debit and Credit Billing Schedules that are for the same amount.

To create and display these redundant Billing Schedules,

1. Click Setup > Custom Settings > Billing System Properties > System Properties > Edit.
2. Select the Create Redundant Billing Schedules check box.
3. Click Save.