Hi,

you can overwrite all methods according to your needs.just create a new module inherit of your object .

for example :

Method create

def create(self, cr, uid, values, context=None):                
        #your treatment       
        return super(res_partner, self).create(cr, uid, values, context)

Method copy :

 def copy(self, cr, uid, id, default=None, context=None):
            if not default:
                default = {}
            #your treatment
            default.update({           
                'name': ' custom name',
            })
            return super(res_partner, self).copy(cr, uid, id, default, context=context)

Thanks.