What Happens If The Customer Does Not Pay?
If a payment (or some other type of credit) is not received by the trigger date of the last event in the severance process, the service agreement is stopped (as long as you've setup your severance process to include an Expire Service Agreement event as the last event). The expiration of the last service agreement will, in turn, trigger a final bill. If the account doesn't pay the final bill, a write-off process will be started.
Final bills. The account will be setup for final billing when the LAST service agreement linked to the account is stopped. Refer to Finalizing Pending Stops for more information about how the system changes the account's bill cycle when the last service agreement is stopped.
Refer to The Big Picture Of Write Off Processing for more information about the write off process.