Barcelona have been banned from signing players for next season after irregularities were found in their dealings at youth level by FIFA.
The club have been sanctioned for breaching rules in 10 signings between 2009 and 2013, with FIFA placing an embargo on Barca for the next two transfer windows.
Barca's transfer dealings have come under huge scrutiny this season, with former president Sandro Rosell resigning after questions were raised over the close-season signing of Neymar.
The Brazilian officially moved to Camp Nou for €57.1million, though the striker's former club Santos only received a fraction of that and now the signing of youngsters from abroad in recent years has landed the Spanish champions in more hot water.
A FIFA statement read: "The FIFA Disciplinary Committee has sanctioned the Real Federacion Espanola de Futbol (RFEF) and Spanish club FC Barcelona for breaches relating to the international transfer and registration of players under the age of 18.
"The Disciplinary Committee regarded the infringements as serious and decided to sanction the club with a transfer ban at both national and international level for two complete and consecutive transfer periods, together with a fine of CHF 450,000 (€370,000).
"Additionally, the club was granted a period of 90 days in which to regularise the situation of all minor players concerned."
The RFEF have been fined CHF 500,000 (€410,000) and granted a year in order to "regularise their regulatory framework and existing system concerning the international transfer of minors in football".
Last week, Barca secured the signature of 17-year-old Croatia international Alen Halilovic, beating off reported interest from the likes of Tottenham and Arsenal.
That deal did not form part of FIFA's investigation, but if a transfer embargo were to be upheld it would be a huge blow for the Catalan giants.
With fierce rivals Real Madrid likely to reinforce again in the close-season, as well as the likes of UEFA Champions League rivals and historic big-spenders Manchester City and Paris Saint-Germain, a ban on conducting any business could leave Barca trailing in the wake of other European super-powers.
An embargo could cause particular concern for Barca in defence, with goalkeeper Victor Valdes and centre-half Carles Puyol – two mainstays over the past decade – set to leave the club at the end of the season.
Valdes, who suffered a serious knee injury in last Wednesday's 3-0 win over Celta Vigo, has been replaced by 38-year-old Jose Manuel Pinto for the time being, with Borussia Monchengladbach keeper Marc-Andre ter Stegen widely reported to be lined up as his long-term successor.
Though Barca are yet to confirm any appeal, they may be boosted by the fact Chelsea had a similar sanction overturned by the Court of Arbitration for Sport in 2010 after being hit with an 18-month embargo over the transfer of French midfielder Gael Kakuta.
|Sporting Kansas City 4 Dallas 0: Nemeth, Zusi destroy 10-man visitors|
|Geferson replaces Marcelo for Copa America|
|PSG captain Silva in doubt for Coupe de France final|
|Valverde: Bilbao to stick to style in Copa final|
|´Another round of indictments´ expected in FIFA case|
|Youngsters promoted to Australia´s squad to face Kyrgyzstan|
|Disappointed FFA, US Soccer still want change|
|Gutierrez: Ashley abandoned me|
|US senator urges Blatter to release Garcia Report|
|Gutierrez, Taylor released by Newcastle|
|Figo calls on re-elected Blatter to resign after ´dark day´ for football|
|Szczesny blasts father over ´idiotic´ comments|
|Blatter vows to leave ´strong´ FIFA|
|Blatter re-elected as FIFA president|
|BREAKING NEWS: FIFA elections set for second round of voting|
|Atsu wings in for Bournemouth campaign|
|Klopp: Pokal final not about me|
|Clement says Real goodbyes|
|Inter v Empoli: Icardi looking for final flourish|
|BREAKING NEWS: Blatter - I will fix FIFA|
|Northern Ireland v Qatar: O´Neill keen to prepare for Romania test|
|Palestine drop proposal for Israel suspension|
|Suarez will only get better, warns Iniesta|
|Martinez keen to recruit quickly|
|Monk keen to build on successful Swansea campaign|
|Fit-again Suarez set to aid Barca´s treble quest|
|Anonymous ´bomb´ threat received at FIFA Congress|
|Qatar organisers insist World Cup bid met ´highest ethical standards´|
|Wilkinson and Sorensen leave Stoke|
|Blatter: You can´t ask everyone to behave ethically just like that|
|Van Bronckhorst positive about Feyenoord future|
|Australian police to look into FFA-Warner dealings|
|Dardai signs Hertha deal|
|Protester interrupts FIFA Congress|
|Spurs complete Wimmer signing|
|Warner questions charges following release|
|Mexico v Guatemala: Herrera´s men kick off Copa preparations|
|New Zealand no longer supporting Blatter|
|´Post-World Cup trauma´ affected Mertesacker|
|Racing Club 0 Guarani 0 (0-1 agg): Draw sees Paraguayans through|
|Hamburg shocked by Karlsruher attack - Labbadia|
|Serie A Preview: Napoli, Lazio eye Champions League|
|Hodgson will not overstay England welcome|
|Scholes: United must keep Di Maria|
|Leyton Orient appoint Hendon|
|Benteke has a buy-out clause - Sherwood|
|US Soccer will support Prince Ali in FIFA election|
|Dynamo disappointed with officials after City friendly abandoned|
|Calls for Suarez appeal gather momentum|
|Eredvisie Review: Vitesse denied by late Uth goal, NAC Breda boost survival hopes|
|Rangers 1 Motherwell 3: McCall´s men facing uphill struggle|
|Hamburg 1 Karlsruher 1: Bundesliga side escape with draw|
|Blatter vows to lead FIFA clear of trouble as corruption scandal rolls on|
|Bundesliga: Bayern Munich season review - League crown not enough to signal successful campaign|
|Genoa forced to wait for UEFA licence|
|Injured Cardozo out of Paraguay squad|
|CONCACAF provisionally dismisses Webb and Li|
|Klopp: Career highlights of a charismatic coach|
|Verona v Juventus: Ogbonna seeks strong Champions League warm-up|
|FA charges Demetriou over betting breaches|
|Atalanta v Milan: Inzaghi faces last chance to prove worth|
|King joins Bournemouth as QPR rebuild begins|
|Plymouth part ways with Sheridan|
|Hernandez banned for three matches|
|Chelsea star Fabregas has nose surgery|
|Blatter: More bad news may follow|
|Galliani hopeful over Ancelotti deal|
|Frontzeck to continue as Hannover coach|
|Tremmel released as Tate waves goodbye to Swansea|
|Arsenal v Aston Villa: Sherwood out to upset holders|
|UEFA open to boycott of World Cup - Platini|
|Porto activate release clause for Casemiro|
|Athletic Bilbao v Barcelona: Catalans seeking second leg of treble|
|Auxerre v Paris Saint-Germain: History beckons for Ligue 1 champions|
|Cole confirms West Ham departure|
|UEFA elect not to boycott FIFA Congress|
|Borussia Dortmund v Wolfsburg: Klopp aiming for triumphant farewell|
|Flamini hails Coquelin impact at Arsenal|
|South Africa deny wrongdoing in World Cup bid|
|Benitez confirms Napoli exit|
|McShane among six released by Hull|
|Cerci committed to Milan|
|West Ham expect Collins to return for pre-season|
|Real deny Pogba bid|
|Important to keep Chelsea squad together - Mourinho|
|Alonso: Gerrard was magic|
|Pochettino silent on Ings speculation|
|Visa threatens to ´reassess´ sponsorship amid FIFA scandal|
|Blatter skips FIFA Medical Conference|
|MLS Preview: Revs not out for revenge against Galaxy|
|MLS Review: Sounders go top in West, Timbers and Galaxy win|
|AFC stands by Blatter|
|Matheus ´alright´ after collapse - Markevych|
|Copa Libertadores Review: River, Inter through to semis|
|Signing Toni a ´long shot´ for Adelaide|
|Ramsey good enough for Barca - Coleman|
|Bacuna pushing for Benteke stay|
|Evans stunner settles City friendly in Toronto|
|Banega: Emery a great coach|
|Emery tight-lipped on Sevilla future|
|Argentina finalise Copa America squad|
|Nike issues statement following arrest of FIFA officials|