<em><span lang="EN-US">The principle of Pacta Sunt Servanda as part of the legal principle, which is commonly described as "agreement as applicable to the author" carries its own implications in the practice of society, where the public must perform the agreement </span><span>c</span><span lang="EN-US">onsistently, consequent</span><span>,</span><span lang="EN-US"> and full of responsibility. No exception in transactions in Financial Technology (Fintech), the applicability of this principle to be a reference for both parties to equally believe that the transaction process (lending) between them can be held accountable in terms of </span><span>m</span><span lang="EN-US">oral-ethical laws. The purpose of this research is to describe the validity of the </span><span>p</span><span lang="EN-US">acta </span><span>s</span><span lang="EN-US">unt </span><span>s</span><span lang="EN-US">ervanda of the agreement on Fintech and describe the </span><span>p</span><span lang="EN-US">acta </span><span>s</span><span lang="EN-US">unt </span><span>s</span><span lang="EN-US">ervanda basis reviewed through the study of </span><span>u</span><span lang="EN-US">s</span><span>h</span><span lang="EN-US">ul fiqh to soften a concrete solution against </span><span>l</span><span lang="EN-US">egal problematics that exist on Fintech. The methods used in this study are juridical-normative.</span><span lang="EN-US">The results of the research show that with the trend of ease carried by the </span><span>Fintech</span><span lang="EN-US"> can erode the essence of the principle of the law itself, and create a destructive mindset which is an agreement of the </span><span>r</span><span lang="EN-US">egarded as administrative terms that need to be met when conducting transactions on Fintech, so that various provisions inherent to the unreached </span><span>F</span><span lang="EN-US">intech agreements. In addition to the absence of strict supervision in the process of </span><span>F</span><span lang="EN-US">intech transactions facilitate the occurrence of fraud against the initial purpose of granting Fintech funds by the loan recipients.</span></em>