Not to be quoted and On the QT

On the QT and not to be quoted are semantically related in not for the record topic. In some cases you can use "On the QT" instead an adverb phrase "Not to be quoted".

On the QT adverb - In secrecy; not openly.

Not to be quoted and on the QT are semantically related in not for the record topic. You can use "Not to be quoted" instead an adverb phrase "On the QT".