If you do business and buy goods on the basis of the so-called RN, you do not have some rights as if you bought the goods as a consumer. The terms and conditions of the guarantee in these cases are determined by the seller’s terms and conditions, the concluded contract, or the general rules of the Civil Code.
When purchasing, be careful when entering your contact details, the seller could consider your purchase as a purchase for a company if the RN is entered.
If you are unsure, you can always contact the seller beforehand asking how to proceed with your purchase to avoid possible discrepancies in the future.