General Antonyms:
* Ignore: To pay no attention to.
* Overlook: To fail to notice.
* Miss: To fail to see or understand.
* Disregard: To pay no attention to.
* Neglect: To fail to care for or attend to.
Antonyms related to identification:
* Misidentify: To identify incorrectly.
* Confuse: To mistake one thing for another.
* Misunderstand: To interpret incorrectly.
* Disavow: To deny any knowledge or responsibility for.
Antonyms related to appreciation:
* Disrespect: To show a lack of respect for.
* Undervalue: To regard as being less important or valuable.
* Devalue: To diminish the value of.
* Disparage: To speak negatively about.
The best antonym for "recognize" will depend on the specific situation and the meaning you want to convey.