Article 4
1. The Republic of Bulgaria shall recover the incompatible aid granted under the swap transactions referred to in Article 1 from the beneficiaries. 2. By way of derogation from paragraph 1, the incompatible aid may be recovered from the beneficiaries by undoing the swap transactions, in cases where no material alterations have been made to both the publicly owned and privately owned forest land concerned by the transaction since the date of that transaction. 3. The sums to be recovered shall bear interest from the date on which they were put at the disposal of the beneficiaries until their actual recovery. 4. The interest shall be calculated on a compound basis in accordance with Chapter V of Regulation (EC) No 794/2004 and with Regulation (EC) No 271/2008. 5. The Republic of Bulgaria shall cancel all outstanding payments of aid under the swap transactions referred to in Article 1 with effect from the date of adoption of this decision.