Hi,

I tried overriding activity_update in hr.expense.sheet to prevent notifications:

class HrExpenseSheet(models.Model):

    _inherit = "hr.expense.sheet"

    def activity_update(self):
        records = self.filtered(lambda r: r.state not in ['draft', 'submit', 'approve', 'post', 'done'])
        if records:
            super(HrExpenseSheet, records).activity_update()

But Odoo still sends an email to the manager when the expense sheet state changes. Which method is actually responsible for these notifications, and how can i disable this feature?

Thanks!