In the book entitled "Collateral in Civil Law. Evidence from Romanian Banking System" we proposed to tackle the important issue of guarantees institution in terms of changes to the New Civil Code. Reasons for choosing this theme is enriched in the importance of legislative developments due premiere appearance in the Romanian legislation, to the fact that the collateral takes the form of mortgage securities, which went from the scope of collateral in the mortgage. The context is the tracking approach generally guarantees system evolution, from their appearance, and to shape the defining features of guarantees. Also, in this paper, we proposed an analysis of the collateral in terms of legislation and regulations contained in the New Civil Code.The main purpose of this book is the detailed analysis of the concept of security, as outlined in the Romanian judicial doctrine and in the foreign original analysis in terms of safeguards obligation, and legal means to guarantee the obligations recognized all creditors.