25.5 Security for payment of receivables and payables

In order to secure the repayment of its credits, the Group uses a number of individual security instruments and their combinations. The most frequently used instruments include claims transfer agreements, bills of exchange and declarations of voluntary submissions to enforcement procedures. Additionally, the Group uses powers of attorney to use bank accounts and assignments of receivables.

As at the reporting date the following assets constituted security for the repayment of liabilities and contingent liabilities:

Property, plant and equipment shown in the table above constitute security for obtained investment credits. As at December 31, 2020 and December 31, 2019, the most significant item  was the capped mortgage on the 858 MW power generation unit in PGE Górnictwo i Energetyka Konwencjonalna S.A.,  Bełchatów Power Plant Branch.

In accordance with the regulations of the Warsaw Commodity Clearing House, the PGE Group companies are obliged to maintain a certain balance of cash on accounts held with PKO BP Bank and Santander Bank Poland to participate in the guarantee fund. The balance of cash reported as restricted cash under these two obligations amounted to PLN 93 million as at 31 December 2020 (PLN 230 million in the comparative period).