The latest release of information from the infamous Football Leaks allege that Chelsea offered a sum of £120,000 as a sign-on fee incentive for a goalkeeper who was just 12-years-old.

Karlo Ziger now plays for the Blues' youth set-up, though the leaks claim Chelsea agreed the payments for the Croatian youngster, who is now 17, including the initial £120K.

The claims have been brought forward by German publication Der Spiegel, who detail how the goalkeeper moved from his native Croatia to London and how - in the process - he seemed to disappear from playing records.

Chelsea are alleged to have offered goalkeeper Karlo Ziger £120K to sign when he was just 12

It is alleged the Blues paid rent on a house in London for him and his family until he turned 16

The documents go on to claim the Blues paid the rent on a house in London for him and his family until he turned 16 and was legally able to sign for Chelsea.

Der Spiegel wrote that, during an interview with a Croatian magazine, the player's father Darko said that the family had moved to London in early 2014.

Further admissions were made by the father that he was registered as a Chelsea employee during the process.

The deal surrounding Ziger's switch is believed to be part of Fifa's case against Chelsea

A residency permit issued to the player was identified by the leaks and seems to suggest the same.

Football Leaks also claim to have obtained an internal club spreadsheet which shows that Ziger trained with the Chelsea youth club on more than 250 days between 2014 and 2016.

The same Croatian magazine who spoke to Ziger's father, Nacional, state the overall cost of Chelsea acquiring the player was £808,000 and that Ziger's name suddenly vanished from the records of the Croatian Football Federation.

They purport that the last game he played with NK Zagreb was in September 2013. In February 2014, the goalkeeper was de-registered from the association.

In February 2014, the goalkeeper was de-registered from the Croatian football association

Ziger next reappeared on football records when he was 16-years-old, and then an official player of Chelsea.

Croatian 'keeper Ziger and the deal surrounding his switch is believed to be part of Fifa's case against the Blues, which led to a two-window transfer ban commencing this summer.

Chelsea are still in the process of appeal against the ban, and stated: 'The club does not comment on speculation concerning confidential contracts or player-related matters.'