[Answer]-Questions about extending any Django app

You can use the django signals for exactly this situation. Signals are meant for apps that need to be distributed generally and won’t always know how they will be integrated into a project.

The signal of interest to you here is the pre_save. You can connect a pre_save to the pinax.account model and be notified when a save is about to happen. This will give you a chance to make changes to that model instance. Signals are synchronous, meaning you are making your change serially, right before the pinax.accounts will finish committing the save