Oaths
fairy gifts: you mean no harm to me and mine, you will swear it 89
The Ancient Bargain & Lies
Mercy Thompson Series #3: Iron Kissed
-  most fae cannot tell a lie 
-  they are very, very good at making you think they are saying one thing, when they mean another, but they cannot lie 
-  they can do the damnedest thing with the truth, but they cannot lie 
-  a conversation with someone who can't lie is the questions they don't answer 
Mercy Thompson Series #11: Storm Cursed
-  goblins are a part of that ancient bargain18 
-  if the powers that be hear us lie, a terrible and mortal fate comes to us, as to all fae18 
-  those greater in power may fight off their fate for a time, but for the lesser fae, like goblins, we die the moment a lie, knowingly spoken, leaves our lips18 
Mercy Thompson Series #12: Smoke Bitten
-  fae are creatures whose lives are bound by rules282 
-  that they cannot lie being the core rule all of them must follow282 
-  important thing to remember about the rules is that they constrain all of the fae; but only the fae282 
-  the fae can lie—they just suffer a horrible fate if they do282 
-  that may be the rule; if a fae lies they will suffer a horrible fate282 
 
Fae Laws
Bargains
Mercy Thompson Series #5: Silver Borne
Traditional Structure of a Fae Bargain
Bargain is Requested
Bargain is Struck
Bargain is Accepted
Bargain is Done
-  it is humans who betray their bargains 
-  accepted and sealed the bargain in blood 
-  can be a contest; usually musical; a true bargain 
-  different bargains; stories of footraces, swimming contests, eating contests 
-  fairy bargains that left you ruing the day you made them 
-  cannot break the heart of the bargain; it must be something that is possible, however unlikely—for the challenger to accomplish 
-  can be struck with other supernatural creatures;  River Devil
Mercy Thompson Series #8: Night Broken
Mercy Thompson Series #9: Fire Touched
-  fae are very particular about their bargains67 
-  grandstanding is a very bad way to make bargains149 
-  few fae who can bargain for the fae as a whole166 
-  even if you bargain, you might not be safe171 
-  bargaining room; you won't know what you have until you talk to them173 
-  there is magic in bargaining with the fae that has nothing to do with what they had the power to do or not do218 
-  that's why so many of the fae are willing to strike odd bargains—they can gain power from it218 
-  a bargain can be sealed in blood220 
-  receiving an item in fulfillment of our bargain324 
-  ways to void a bargain325 
Mercy Thompson Series #10: Silence Fallen
Mercy Thompson Series #11: Storm Cursed
Mercy Thompson Series #12: Smoke Bitten
Examples 
Thomas Hao Father bargained with Master Vampire Butte
Ariana Brewster bargained with Daphne Rondo
River Devil bargained to exchange Mercy for a child
Zee Adelbertsmiter bargained his safety for his son
Alistair Beauclaire bargained for the Walking Stick
Gray Lords bargained with Adam and Mercy to maintain neutrality in the Tri-Cities 
 
Fae Guesting Laws
Fae Policing
Mercy Thompson Series #3: Iron Kissed
-  fae do their own internal policing 
-  Gray Lords own several law firms on the East Coast 
-  fae who are suspected of crimes tend not to survive to need lawyers 
-  imprisoning a fae is…impractical 
-  it's damned difficult; holding a person is hard enough; holding a fae for any time at all, if he doesn't want to be held, is near impossible 
-  a life sentence is highly impractical when fae can live for hundreds of years 
-  if you imprison fae, for whatever reason, you'd better be dead when he gets out or you'll wish you were 
-  human justice just isn't equipped to deal with the fae, so they take care of it 
-  a fae who commits a serious crime—like murder—is simply executed on the spot 
 
Fae Magic
Fae Glamour