(24)In securitisations which are not true-sale, the underlying exposures are not transferred to an issuer entity which is a SSPE, but rather the credit risk related to the underlying exposures is transferred by means of a derivative contract or guarantees. This introduces an additional counterparty credit risk and potential complexity related in particular to the content of the derivative contract. For those reasons, the STS criteria should not allow synthetic securitisation. The progress made by the EBA in its report of December 2015, identifying a possible set of STS criteria for synthetic securitisation and defining ‘balance-sheet synthetic securitisation’ and ‘arbitrage synthetic securitisation’, should be acknowledged. Once the EBA has clearly determined a set of STS criteria specifically applicable to balance-sheet synthetic securitisations, and with a view to promoting the financing of the real economy and in particular of SMEs, which benefit the most from such securitisations, the Commission should draft a report and, if appropriate, adopt a legislative proposal in order to extend the STS framework to such securitisations. However, no such extension should be proposed by the Commission in respect of arbitrage synthetic securitisations.