How to hand in "Guild Summons"
 

The wiki treats it as no-brainer and can't find it using forum search.

I've tried taking the note on cursor and using both left/right-click on them (probably completely wrong after hitting results for current-day EQ on Google), I remember playing a bit long time ago and you could open a window where to put the quest items but can't open that.

1) Left click on the item you want to give; it should now show up on your cursor

2) Left click on the guild master, making sure no other NPCs are in the way; the window to trade to them should appear

3) Click the button to trade in that window

I did eventually manage to do it by trying the same thing again. Maybe my own character model was blocking it the first time?

You have to make sure you're standing close enough. For "large" races, especially giants, you have to be right on their toes.

-Mcoy