First of all, English is not my first language, so, please, forgive me for some mistakes, and sorry if I couldn't make myself understood.
I'm currently working for a company that clearly underpays me. My boss went as far as say straight to my face that he knows that my paycheck is not enough for my position.
When I asked for a raise, he said that it wouldn't be possible for this year, but I might get some in the following year.
So I started looking for a new job.
When I got a job offer, I said to my boss I was leaving but he said he would like to negotiate a counter-offer.
However, in order to proceed with the counter-offer, he said that he would need a written job offer by that company that was hiring me.
I was a little taken aback and might have overreacted. I refused to do so.
I asked around a little bit in the office, and none of my colleagues that went thought the same situation was asked to show a written job offer.
Did I overreacted refusing to show him the offer? I feels like he doesn't believe me, and it kind of hurts me a little.