The NABU and the SAPO have submitted the indictment against former Deputy Head of a Prosecutor General's Office department Kostiantyn Kulyk to court. In January 2026 he was served with a suspicion notice for aiding and abetting the abuse of office by former SFS Deputy Head Serhii Bilan, causing UAH 641 million in state losses.

According to the investigation, in 2014–2016 Oshchadbank challenged an SFS tax assessment decision. Bilan was required to rule on the complaint but failed to do so within the statutory deadline — effectively acting in the bank's interests, as an unanswered complaint is automatically deemed granted.

This was facilitated by Kulyk, who, according to the investigation, created the appearance that signing a decision was impossible: on the last day of the complaint review period he requisitioned all of the complainant's audit materials. This gave Bilan a formal pretext to declare he could not rule on the complaint due to missing documents.

Bilan was First Deputy of then-SFS head Roman Nasirov. He entered a plea agreement, subsequently approved by the HACC. The verdict is classified, but it is likely that under the agreement's terms Bilan agreed to provide incriminating testimony against Kulyk.

A special pre-trial investigation was conducted against Kulyk, as he is in hiding abroad. In March 2026, the HACC also arrested him in absentia.

Kulyk is notable as the first official in Ukraine to face illicit enrichment charges, back in 2015. He was not convicted, however, as in February 2019 the Constitutional Court of Ukraine declared Article 368-2 of the Criminal Code — under which he had been charged — unconstitutional.