Abstract: A data processing system and method for assisting in searching items on Internet and to a method related to invoicing a user based on the action taken on the search results. An optimized transactional process for the selection of an appropriate parameter for action and the take decision on the basis of results obtained. For example in a robotic control, technical process control in an industrial environment, database searches and analysis in respect of trademarks, or in a control military defence hardware. The system offers a search service configured to check if a user took action on the search result it is configured to invoice the user for example, a searched new trademark was later registered by a searcher, and invoice the searcher later if the trademark was registered afterwards.