[mothered]

Does that mean that he isn't following company protocol, but is taking it personal and doing this in his free time because he is frustrated why I told them I received nothing?

The majority of times, drivers do It via their own volition.

I've read about drivers demanding SEers to fill in documents in which are written that they in fact did receive the parcel, does this actually happen

Although It's not a commonality, I can confirm that It does In fact happen.

and is this the case here?

Impossible to say.

I don't know the driver's Intention.