Yes, in article 8.2 of the MPC conditions it’s clearly stated that the seller shall be entitled to require the buyer to provide adequate security for payment (e.g. prepayment/ bank guarantee etc.) before effecting the delivery. If said security for payment is not provided or – to be decided by the seller – not satisfactory, the seller shall be entitled to defer fulfilment of (the rest of) his obligations under the contract by written notice. The seller shall then in no event be liable for any loss that the buyer may sustain as a result of said deferral.