When I apply for a job, companies require me to fill a form (and they usually allow me to attach my CV in PDF, but not always) which requires me to fill in my previous job experience.
One of the fields to fill is "salary when working there" and I cannot proceed without entering a value.
What value should I write there? What should I write when:
I signed a contract which stated that I cannot share contract details with others (I do not care if it's legal to sign such a contract)
I do not want to say what was my previous salary
I feel I was underpaid
I don't care whether they know about my salary
This list describes four different cases I would like to know about, not one.
If you think there may be other situations worth mentioning, please include them in your answer.
I am applying to job in UK, but I am moving from Poland.