Approval During Interview..what next?

[teachinusa]

My application was approved for citizenship and the officer gave me a formal Congratulations Letter.

What should I expect next?

Does another approval come in mail?

And/or is the Oath letter the only letter to expect?

The officer told me I would be sworn in at Courthouse as I had chosen to spell my last name differently. Does it take longer or how does it work?

Any such experiences please share and kindly advice too!!

Thanks for the immense help that was extended previously by the members here.

[nwctzn]

As far as I know the oath letter is the only letter you will get.

[teachinusa]

Thanks.

How much time does it take from date of Clearance of N400 to get oath letter?
In this case ,I'm talking about oath at County Courthouse.

Any inputs.