When to tell
You should be
honest when giving an employer information about yourself as they
will probably check things like qualifications and work experience.
You can be sacked if information you have given is found to be
untrue.
When not to tell
Sometimes employers ask for information about things
like health issues and criminal convictions. If this applies to
you, you may need to check what information you legally need to
give the employer so that you don't put your application at risk by
telling them things which they don't need to know.