Ruling of the Supreme Court of the Slovak Republic, file No. 4 Obdo 11/2003, published in the periodical From the Practice of Courts No. 5/2004
Parties to a commercial contractual relation may agree a default interest rate which shall prevail over the provisions of law in the case that the debtor is in delay with the performance of a financial obligation. In the case that a purchase agreement in writing in not effective such agreement may be incorporated into an invoice by which the purchase price shall be invoiced by the seller providing that the will of the purchaser to accept the seller's proposal is expressed in a manner which does not indicate any reservations. A mere signature of the invoice during the take-over of goods shall not be deemed a sufficient expression of such will.
