West Ham have been found guilty of breaching FA rules following crowd violence at their Carling Cup match with Millwall in August.
Millwall have been cleared of all charges however and both clubs have had charges of failing to prevent racist behaviour by fans declared as "not proven" by an disciplinary panel.
The FA's independent regulatory commission will decide West Ham's punishment on Friday after finding the club guilty of two charges: failure to ensure their supporters refrained from violent, threatening, obscene and provocative behaviour, and failure to ensure their supporters did not enter the field of play.
West Ham face a range of possible sanctions including being forced to play games behind closed doors and a heavy fine.
The violent clashes led to 64 arrests and the stabbing of a Millwall fan outside Upton Park, and there were pitch invasions during the match.
An FA statement read: "The commission will reconvene this Friday (15 January) to consider the issue of sanctions. The FA will now await the full written reasons from the independent commission before making any further comment."