Nowadays, the development of transactions in finacial institution very rapidly, both in the new contracts, development of contracts that already exist, or a combination of the two contracts that have been established. This is a response of financial institutions to the need of modern society, as well as an effort to give alternative business transactions to its customers.Derivatifs transactions is hybrid investment, grafts from the original, or new transactions arising as a form of deviation or development or specificity of the transactions that have been established. These transactions usually have patterns similiar to original transactions, but there are different things that are influenced by certain considerations such as tradition, mashlahah, etc. As for the models of derivatif transactions in islamic financial institution are : the merging model (include : mudarabah mushtarakah, bai’ ‘inah, bai’ tawarruq, bai’ wafa and beli gadai emas), improvement ( include : mudarabah and musharakah with jaminan, mudarabah and musharakah parrarel, and rahn tasjily), and qiyas model (include :  paroan, pro telon, pro papat, etc).Ulama have argued that derivatif transactions based on the principle “al-ashlu fi al-mu'amalah al-ibahah, hatta yadullu al-dalil 'ala tahrimihi. Departing from this principle, then the Ulama allow, ikhtilaf, and forbid the derivatif transaction. Keywords; transaksi derivatif, lembaga keuangan syariah.

The goal of this research is to examine the role of the antutama.co.id application in increasing customer satisfaction in accordance with Islamic law. This study employs a qualitative research approach with field case study research and a descriptive research design. According to the findings of the research, the role of the antautama.co.id application demonstrates that customers who use the application have a very high level of satisfaction. PT. Anta Utama Kediri truly provides maximum service with various policies in the application, namely the antautama.co.id application as a good service system for public customers who order to buy airline tickets online. The application system is in accordance with Islamic principles, namely honesty, trustworthiness, and good nature, so that customers using the antautama.co.id application can trust it, the core of Islamic sharia, including providing good services to the community according to Islamic sharia.

Of the several problems based on the mapping of problems carried out at the beginning of this service activity which is the cause of the inhibition of the development of the "Ribath Darul Maslahah" Cooperative, the Great Mosque of Arribath, Jogoroto District, among others, are 1. Community Perception 2. Human Resources 3. Management Management 4. Capital. However, after socialization and training, some of these problems can be resolved, although not yet fully resolved. It is proven that from the side of the cooperative members, with the cooperative training, the members can understand the existence in depth because the cooperative is related to its main finances so that members understand the credit debit and profit calculations based on the RAT each year. And the current condition of the existence of cooperatives can increase the income of the surrounding community, with a very small percentage due to the covid-19 pandemic, which has a huge impact on the economic sector and people's income. If the people's income increases, the basic savings and voluntary savings can be increased. So that the cooperative's ability to expand the business is even wider. And finally, it can further increase the income of members and the surrounding community.