Looking on the internet deeply has found these results:

I believe I am not the intended recipient is the most popular phrase on the web.

I believe that I am not the intended recipient 11 results on the web	I believe I am not the intended recipient 14,870,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
But I believe that I am a fast and accurate judge of character. Yes, I believe that I am that person. I believe that I am drawing the right conclusions. But I believe that I am a fast and accurate judge of character. I believe that I am an old soul. I believe that I am afraid of you. Where an authority has received a request or information of which it is not the intended recipient, it shall send a message by electronic means to the sender without delay and, in any event, no later than five working days after receipt. I believe that I am sufficiently qualified to be a Member of the European Court of Auditors.	I believe I am in need of medical attention. And I believe I am not. I believe I know why I am here. I believe I am smiling, Mrs. Lincoln. Where an authority has received a request or information of which it is not the intended recipient, it shall send a message by electronic means to the sender without delay and, in any event, no later than five working days after receipt. I believe I am going to like it here. I believe I am entitled to another three sentences. I believe I know why I am here.

I believe that I am not the intended recipient

11 results on the web

I believe I am not the intended recipient

14,870,000 results on the web

More popular!

But I believe that I am a fast and accurate judge of character.
Yes, I believe that I am that person.
I believe that I am drawing the right conclusions.
But I believe that I am a fast and accurate judge of character.
I believe that I am an old soul.
I believe that I am afraid of you.
Where an authority has received a request or information of which it is not the intended recipient, it shall send a message by electronic means to the sender without delay and, in any event, no later than five working days after receipt.
I believe that I am sufficiently qualified to be a Member of the European Court of Auditors.

I believe I am in need of medical attention.
And I believe I am not.
I believe I know why I am here.
I believe I am smiling, Mrs. Lincoln.
Where an authority has received a request or information of which it is not the intended recipient, it shall send a message by electronic means to the sender without delay and, in any event, no later than five working days after receipt.
I believe I am going to like it here.
I believe I am entitled to another three sentences.
I believe I know why I am here.