An aircraft is a subject to different requirements- international, regional and local. Several documents, the format of which is strictly regulated, are needed for safe and supported operations. NOTAM, or notice to airmen, is one of them. It is a short message, which gives information to all airspace users concerned about particular activities on the ground or in the air. In order to notify other users about unmanned aerial system operation such message shall be submitted. As there are some technical and operational differences between manned and unmanned aircraft, there shall be some additional information included into standard NOTAM format. By organizing its format it would be easier for both- appropriate service providers and airspace users- to understand the content of it.