I can't find it!

I bought the trilogy online not too long ago and i've been wondering where my trial key is. Is it possible I didn't recieve one, or maybe I'm not looking hard enough?

Why are you asking here? Did the company email it to you? Was it in the box if you got it shipped to you? If its already added to your account you can, at the character select screen press the Edit Account button, check Manage Keys..never mind I tried that in game and it only says the title of the product not the key

Perhaps you misunderstood me, I got it in the mail, in a box, it came with an "activation key" which gave me full access to all three campaigns. I can't find the "trial/buddy key" which I'd like to give to a friend. I'm asking here since I thought someone might be able to help me.

There's a topic maybe on this where people give out their trial keys. I didn't get a box version and for some reason I didn't get a trial key for GW, though I did for some other games.

[B]Did you check in the manual pages? When someone couldn't find their access key that's where it was.

Although there might not be one. Here is the package info from PlayNC FAQ.

Question
What are the contents of the Guild Wars Trilogy Edition game box?

Answer

The Guild Wars Trilogy Edition game box for North America contains:

Access to all three Guild Wars campaigns - Guild Wars Prophecies (Game of the Year Edition), Guild Wars Factions, and Guild Wars Nightfall!
Game Disc - 1 DVD
Guild Wars Trilogy Quick Start Guide
The exclusive Golem Hero bonus in-game item as well as the in-game item, the Fire Imp
Quick Reference Card - Your single access key is located on this card. This single access key provides access to the three campaigns, Prophecies, Factions and Nightfall as well as the bonus in-game items

You could try getting a trial account from this page:
http://www.guildwars.com/freetrial/

That's new to me. Guess it's going to replace the trial keys and allow NCWest to control who uses a trial key. Another defense in the war against the gold sellers.