Personalisation Doubt

Hi

My aim is to have personalisation to modify a field in AP Invoice automatically and should be saved. I will create the event object as Invoice Validation.

So when i import 100 invoices and ran the invoice validation program, that personalisation should work.

1) Let me know whether we can me personalisation work in this way. Because many may say personalisation works only when u go to that form.

2) When i tried this, i face one issue, how to call "save" function in the personalisation configuration. If you can guide me, that will also be helpful.

Thanks