Can I remove the only credit card on my account?

I am a new user from China, and I would like to ask whether the OpenAI API allows me to unbind my credit card immediately after topping up. My boss said he can add funds for testing purposes, but he is concerned about potential unauthorized charges, so we need to be able to remove the credit card afterward.

HI!,

China is not in the list of supported counties, please see https://platform.openai.com/docs/supported-countries

Hi, let me clarify what I meant. My boss has a U.S. Visa credit card. He wants to link it, add funds, pay first, and then unbind the card. We just want to confirm if removing the card is allowed afterward.