No, you will not receive a confirmation from us. You will not receive a request from us to send a 'Life certificate to us.
It depends on the situation. If the other organization is affiliated with the RNI (Non-Residents Registration) this is not necessary. Affiliated agencies include the SVB, the UWV and the Tax and Customs Administration. The list of affiliated agencies can be found here. You will not receive a request to send the 'Proof of Living' in October.
If you have sent the "Proof of living" to an agency that is not affiliated with the RNI, you will receive a request in October. Then you can send a copy of that proof to us. It will be accepted by us if the proof is stamped/signed by an authorized body in the current year. You can also use the app, of course.
You can download the ReadID Ready app for free in the Apple App store or in the Google Play store.