onem (one miles)
Deletion happens immediately and cannot be undone.
Email contact@donneko.com with the subject Account deletion request and include:
We reply within 3 business days and complete the deletion within 30 days.
Why we need those details: onem accounts are anonymous — we never asked for your email or phone number, so we have no way to match an email address to an account. That is the same reason we ask you to prove nothing else: there is nothing else to prove.
Deleting your onem account does not cancel an active subscription — the App Store or Google Play bills it, so it must be cancelled there. See Support for the steps.