Backcheck:
In your offer of employment are you sure it wasn’t stated that you must inform them at least a specified no of months before leaving?

No. Nothing like that in written or oral form.

They now tabled it when I requested for salary after resigning.

Guys make una comment and give me ginger abeg!

So I worked for this organization for a short period of time.

I resigned but I was told I wouldn't get the previous month's salary because of what I don't understand.

There was no formal agreement either written or oral that I must work for a certain number of months before leaving.

I am about to involve the police. What do you think?

This is like a case of the poor fighting the rich.