Gentlemen`s agreements, because they are informal and often not written, do not have the same legal and regulatory protection as a formal treaty and are therefore more difficult to enforce. Een herenakkoord (Engels: Gentlemen`s agreement of gentle agreement) is een overeenkomst gesloten tussen twee of meer partijen. Deze kan zowel mondeling als schriftelijk zijn. In beginsel is een herenakkoord niet rechtens afdwingbaar, maar beroept het op de eer van de partijen. Als sanctie op niet nakoming werden maatschappelijk social middelen gekozen als uitstoting. Here tegenover staat een rechtsafdwingbare overeenkomst. Gentlemen`s agreements waren een veelgebruikte discriminerende tactiek die naar verluidt vaker voorkwam dan beperkende convenanten bij het behouden van de homogeniteit van buurten en voorsteden uit de hogere klasse in de Verenigde Staten. De aard van deze overeenkomsten maakte ze buitengewoon moeilijk te bewijzen of te volgen, en war van kracht lang na de uitspraken van het Hooggerechtshof van de Verenigde Staten in Shelley v.Kraemer en Barrows v.Jackson . Een bron stelt dat gentlemen`s agreements “ongetwijfeld nog steeds bestaan,” maar dat het gebruik ervan sterk is afgenomen.
On the west coast, an intense anti-Japanese atmosphere developed. U.S. President Theodore Roosevelt did not want to anger Japan by passing laws banning Japanese immigration to the United States, as had happened with Chinese immigration. Instead, there was an informal “gentlemen`s agreement” (1907-1908) between the United States and Japan, in which Japan ensured that there was little or no movement in the United States. The agreements were concluded by U.S. Secretary of State Elihu Root and Japanese Secretary of State Tadasu Hayashi. The agreement banned the emigration of Japanese workers to the United States and repealed the order of segregation of the San Francisco School Board in California, which had humiliated and angered the Japanese. The agreement did not apply to the territory of Hawaii, which was then treated as separate and separate from the United States. The agreements remained in effect until 1924, when Congress banned all immigration from Japan.  Similar anti-Japanese sentiments in Canada led simultaneously to Hayashi Lemieux`s agreement, also known as the Gentlemen`s Agreement of 1908, with substantially similar clauses and effects.
 Gentlemen`s agreements were a widespread discriminatory tactic, which would have been more common than restrictive alliances to preserve the homogeneity of upper-class neighborhoods and suburbs in the United States.  The nature of these agreements made it extremely difficult to prove or follow them, and they were long after the U.S. Supreme Court decisions in Shelley/. Kraemer and Barrows v. Jackson.  A source indicates that the gentlemen`s agreements are “probably still in place” but that their use has declined sharply.  A gentlemen`s agreement is an informal, often unwritten agreement or transaction, which is supported only by the integrity of the other party to effectively comply with its terms. Such an agreement is generally informal, oral and not legally binding. Gentlemen`s agreements between industry and the U.S. government were common in the 1800s and early 1900s. The Bureau of Corporations, a predecessor of the Federal Trade Commission, was established in 1903 to investigate monopolistic practices. A report by the U.S.
House of Representatives detailing its United States Steel Corporation investigation stated that in the 1890s there were two general types of associations or bulk consolidations between steel and ferrous interests in which different groups owned ownership, as well as a high degree of independence: the “pool” and the “Gentleman`s Agreement.”  The latter type lacked a formal organisation to regulate production or prices or forfeiture rules in the event of infringement.  The effectiveness of the agreement relied on members to meet informal commitments.  In many cases, the end result may be higher cost or lower quality products for consumers.