At /r/reddevils we have a fantastic tier system to understand the reliability of sources. Lower the tier, higher the reliability.

Some sources on the tier system come under discussion, stating some are unreliable, some more reliable than they let on.

If you think you have a case for a source changing tier based on our summer window, discuss it here and it may be changed for future windows.

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Current tiers:

Tier	Source
Tier 0 (Undisputed)	@ManUtd, manutd.com
Tier 1 (Highest Quality Sources)	BBC, Di Marzio (Sky Italia/Independant Journalist), L'Equipe (France), Sport1 (Germany), Henry Winter (The Times Chief of Football), Simon Stone (BBC Sport), Mohamed Bouhafsi (France), RMCSport (France), Craig Norwood (Club Photographer).
Tier 2 (Proven to have current sources)	Bild (Germany/Bavaria), Der Westen (Germany/Schalke/Gladbach/Dortmund), Kicker (Germany), Pierre Menes (Canal+/France), De Telegraaf (Netherlands), COPE (Spain), Raphael Honigstein (Germany Freelancer/Guardian German News), Voetbal International (Netherlands), James Ducker (the Times), SkySports (in particular; Andy Burton)
Tier 3 (Average reliability, or former Tier 2)	Jamie Jackson (Guardian), Ian Ladyman(Daily Mail), Ste Bates (Mirror), Telegraph, Guardian, Times, Mark Ogden (Independent), Daniel Taylor (Guardian), Caderna SER (Spain), Ruhr Nachrichten (Germany), Le Parisien (France), Ian Herbert (Independent), Jason Burt (Telegraph).
Tier 4 (Aggregators, indirect sources, low reliability)	Sport Witness (aggregator), Newsnow (aggregator), @CheGiaevara (aggregator), BildSport (Germany), Goal.com, Miguel Delaney (Freelance/ESPN/Independant), Guillem Ballague (Sky Sports/Freelance/Cunt), Stuart Mathieson (MEN), Andy Mitten (ESPN/United we Stand), The Independent, Mundo Deportivo (Spain), Marca (Spain/Real Madrid), AS (Spain/Real Madrid), GFN (France/aggregator), Talksport (UK & Ireland), , Here is the City (Aggregator), Bleacher Report (Aggregator that has you click through slideshows to boost ad revenue),
Tier 5 (Known Shitposters and Banned sources)	Tancredi Palmieri (Freelance - makes it up as he goes, not banned, but will be removed during transfer windows), Metro (banned - utter shit), Express (banned - redditwide ban due to vote manipulation), The Sun (Banned - for being the sun), Daily Star (Go there for tits, not news), CaughtOffside (Aggregates, but poses the news as its own), Duncan Castles (Freelancer who in the elegant words of this sub is; A bald headed Cunt), Samuel Luckhurst (Shit-stirring bellend.)
Tier IndyKaila	This guy is worse than an unknown entity. In fact, his Twitter account is so bad, that Russia considered making a Space Station out of it.