Release ios app on your account and access to the customer?

Question

iOS

I'm working on an application for a customer, almost everything is ready, it's time to upload it to TestFlight.
I haven’t taken a personal developer account yet, I planned that the customer would create a new iCloud account and take a subscription for it. But he cannot link the card to a new account and activate it in the developer program.
What is the best way to release the apk - from your account? But I have a lot of personal data there and I don't want to give access to the customer.
What other ideas are there? And how do you work?
It seems to me that it is also not an option for each new customer to create a new account.
A company account is also not an option; there must be a registered company.

Thanks for the advice.

Answer 1

But what prevents the customer from creating an account?
Never place applications/websites/anything of the customer on personal accounts, as it will be you who will be banned if something happens. Yes, and the police happen to come to you. Demo and tests are still possible, but the release must be on an account registered by the customer for his documents.
Give an argument that if you suddenly want to disappear, then he will remain without an application.