Article 21 - Forfeit
If a match cannot take place or cannot be played in full, the member association or club responsible forfeits the match. 2
A match is declared forfeit if a player who has been suspended following a
disciplinary decision participates in the match. 3
A match may be declared forfeit if a player
who is ineligible under the regulations of the competition concerned participates in the match, as long as the opposing team files a protest. 4
The consequences of a match being declared forfeit are as follows:
a) the team forfeiting the match is deemed to have lost 3-0 (5-0 in futsal
competitions), unless the actual result is less favourable to the member
association or club at fault, in which case that result stands;
b) if necessary, the UEFA administration amends the member association or
clubÂ’s ranking in the relevant competition accordingly. 5
If a match is declared forfeit, offences committed during the match remain
punishable.
http://www.ecaeurope.com/Legal/UEFA%...ons 2013.pdf