what happens to an abandoned team?

[SimplySimon]

yes disappear safely, other mistery is when the formation looks like incomplete

ST
----ML-
DL-----
---GK----

but in the game appears a normal formation with 11 players... Is this a abandoned team?

This is a recently abandoned team, or still within 70 days. The team has had first team player contracts expire, but no one has replaced them so gaps appear in the team sheet. When the matches come around, the game automatically fills the positions with players in the squad so that the match can be played