<human>: This professor (Dr. John Doe) is a medal winning professor in an Ivy League school. Dr. Doe had written me a recommendation letter while I was applying to PhD program. It helped a lot and I am accepted to a top school. Years passed, and I was applying to post-doc positions. I did not contact him. While I was searching for positions, I mentioned Dr. Doe's name as my recommendation letter in my CV. Couple of Dr. Doe's old friends saw Dr. Doe's name and sent hi through me. I wrote an email and delivered the hi, Dr. Doe replied back quickly with a kind email. Later, I was filling recommendation letters for an application and wrote Dr. Doe's name. I did not send the whole application though. My intention was, I was about to send my publications, CV and research statement to him to show how much progress I have made during years and ask a recommendation letter again. Then, if he accepts, I will just click submit and done. I was working on research statement, that's why. I f*cked up by giving his name without asking him. He received the notification email and sent me an email that this is wrong and he was not going to send the letter. So I looked like just for saying a hey, it is normal to request a letter without letting him know as if he is already ready to write. I explained the situation to him, but he did not reply back.

Can you summarize the given text in a few sentences?
<bot>: I mentioned a professor's name as my reference without asking him, and he refused to write me a recommendation letter for me.