{"id":17731,"date":"2026-03-12T13:03:40","date_gmt":"2026-03-12T12:03:40","guid":{"rendered":"https:\/\/melo.no\/?p=17731"},"modified":"2026-03-12T13:05:37","modified_gmt":"2026-03-12T12:05:37","slug":"ikke-brudd-pa-lojalitetsplikten-i-kontraktsforhold","status":"publish","type":"post","link":"https:\/\/melo.no\/en\/juridisk-innsikt\/kontrakt\/ikke-brudd-pa-lojalitetsplikten-i-kontraktsforhold\/","title":{"rendered":"No breach of loyalty in contractual relationship"},"content":{"rendered":"<div id=\"fws_6a502cc679660\"  data-midnight=\"dark\" data-top-percent=\"3%\"  data-bg-mobile-hidden=\"\" class=\"wpb_row vc_row-fluid vc_row standard_section\"  style=\"padding-top: calc(100vw * 0.03); padding-bottom: 0px; \"><div class=\"row-bg-wrap\" data-bg-animation=\"none\"><div class=\"inner-wrap\"><div class=\"row-bg\"  style=\"\"><\/div><\/div><div class=\"row-bg-overlay\" ><\/div><\/div><div class=\"col span_12 dark left\">\n\t<div  class=\"vc_col-sm-8 wpb_column column_container vc_column_container col no-extra-padding\"  data-t-w-inherits=\"default\" data-border-radius=\"none\" data-shadow=\"none\" data-border-animation=\"\" data-border-animation-delay=\"\" data-border-width=\"none\" data-border-style=\"solid\" data-border-color=\"\" data-bg-cover=\"\" data-padding-pos=\"all\" data-has-bg-color=\"false\" data-bg-color=\"\" data-bg-opacity=\"1\" data-hover-bg=\"\" data-hover-bg-opacity=\"1\" data-animation=\"\" data-delay=\"0\" ><div class=\"column-bg-overlay\"><\/div>\n\t\t<div class=\"vc_column-inner\">\n\t\t\t<div class=\"wpb_wrapper\">\n\t\t\t\t<div id=\"fws_6a502cc679974\" data-midnight=\"\" data-column-margin=\"default\" data-bg-mobile-hidden=\"\" class=\"wpb_row vc_row-fluid vc_row inner_row standard_section\"  style=\"padding-top: 0px; padding-bottom: 0px; \"><div class=\"row-bg-wrap\"> <div class=\"row-bg\"  style=\"\"><\/div> <\/div><div class=\"col span_12  left\">\n\t<div  class=\"vc_col-sm-12 wpb_column column_container vc_column_container col has-animation no-extra-padding\"   data-t-w-inherits=\"default\" data-shadow=\"none\" data-border-radius=\"none\" data-border-animation=\"\" data-border-animation-delay=\"\" data-border-width=\"none\" data-border-style=\"solid\" data-border-color=\"\" data-bg-cover=\"\" data-padding-pos=\"top-bottom\" data-has-bg-color=\"false\" data-bg-color=\"\" data-bg-opacity=\"1\" data-hover-bg=\"\" data-hover-bg-opacity=\"1\" data-animation=\"fade-in-from-bottom\" data-delay=\"0\"><div class=\"column-bg-overlay\"><\/div>\n\t\t<div class=\"vc_column-inner\">\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t\r\n<div class=\"wpb_text_column wpb_content_element  vc_custom_1773317133879\" >\r\n\t<div class=\"wpb_wrapper\">\r\n\t\t<p>A Norwegian company, Isola, had for many years manufactured and supplied so-called uncoupling membranes for the German company Dural. Dural resold the membranes under its own trademark in Europe and the United States. In 2019, Dural engaged an Italian company, TeMa, to produce a copy of the product. From 2020 onwards, Dural began purchasing this product and reselling it under the same trademark.<\/p>\n<p>In 2022, Isola terminated the supply agreement for cause. It argued that Dural had breached an obligation to purchase membranes exclusively from Isola and, in any event, had violated its duty of loyalty under the contractual relationship. Dural disputed that the termination was justified and brought a claim for damages before the courts.<\/p>\n<p>The Supreme Court, which considered only the issue of whether the termination was justified, ruled in Dural\u2019s favour. There was no basis for implying an exclusivity obligation on Dural, even though the agreement imposed an exclusivity obligation on Isola.<\/p>\n<p>The Supreme Court further held that Dural had not breached its duty of loyalty under the contract. The long duration of the contractual relationship supported a somewhat heightened duty of loyalty. However, that duty could not be extended so far as to alter the commercial allocation of risks and burdens agreed upon by the parties. Isola\u2019s membrane was neither patented nor otherwise legally protected by Isola, and Isola had not reserved any right to restrict Dural\u2019s use of its trademark.<\/p>\n<p>The Supreme Court also considered specifically whether Dural had been under an obligation to inform Isola at an earlier stage that it intended to change its \u201csingle-sourcing approach.\u201d The Court concluded that this obligation had not been breached either.<\/p>\n<p>The judgment contains a broader discussion of the scope of the duty of loyalty in contractual relationships, particularly in commercial contexts.<\/p>\n<p>Source: <a href=\"https:\/\/www.domstol.no\/no\/hoyesterett\/avgjorelser\/avgjorelser-2026\/hoyesterett---sivil\/HR-2026-280-A\/\">Supreme Court<\/a><\/p>\n\t<\/div>\r\n<\/div>\r\n\r\n\r\n\r\n\n\t\t<\/div> \n\t<\/div>\n\t<\/div> \n<\/div><\/div>\n\t\t\t<\/div> \n\t\t<\/div>\n\t<\/div> \n\n\t<div  class=\"vc_col-sm-4 wpb_column column_container vc_column_container col no-extra-padding\"  data-t-w-inherits=\"default\" data-border-radius=\"none\" data-shadow=\"none\" data-border-animation=\"\" data-border-animation-delay=\"\" data-border-width=\"none\" data-border-style=\"solid\" data-border-color=\"\" data-bg-cover=\"\" data-padding-pos=\"all\" data-has-bg-color=\"false\" data-bg-color=\"\" data-bg-opacity=\"1\" data-hover-bg=\"\" data-hover-bg-opacity=\"1\" data-animation=\"\" data-delay=\"0\" ><div class=\"column-bg-overlay\"><\/div>\n\t\t<div class=\"vc_column-inner\">\n\t\t\t<div class=\"wpb_wrapper\">\n\t\t\t\t<div id=\"fws_6a502cc679c64\" data-midnight=\"\" data-column-margin=\"default\" data-bg-mobile-hidden=\"\" class=\"wpb_row vc_row-fluid vc_row inner_row standard_section\"  style=\"padding-top: 0px; padding-bottom: 0px; \"><div class=\"row-bg-wrap\"> <div class=\"row-bg\"  style=\"\"><\/div> <\/div><div class=\"col span_12  left\">\n\t<div  class=\"vc_col-sm-12 wpb_column column_container vc_column_container col no-extra-padding\"   data-t-w-inherits=\"default\" data-shadow=\"none\" data-border-radius=\"10px\" data-border-animation=\"\" data-border-animation-delay=\"\" data-border-width=\"none\" data-border-style=\"solid\" data-border-color=\"\" data-bg-cover=\"\" data-padding-pos=\"all\" data-has-bg-color=\"false\" data-bg-color=\"\" data-bg-opacity=\"1\" data-hover-bg=\"\" data-hover-bg-opacity=\"1\" data-animation=\"\" data-delay=\"0\"><div class=\"column-bg-overlay\"><\/div>\n\t\t<div class=\"vc_column-inner\">\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<div class=\"team-member\" data-style=\"meta_below\"><img decoding=\"async\" alt=\"Atle Mel\u00f8\" src=\"https:\/\/melo.no\/wp-content\/uploads\/2021\/08\/Atle-Melo-10.8-scaled.jpg\" title=\"Atle Mel\u00f8\" \/><h4 class=\"light\">Atle Mel\u00f8<\/h4><div class=\"position\">Partner<\/div><p class=\"description\">amelo@melo.no<br \/>\n+47 951 80 979<\/p><\/div>\n\t\t<\/div> \n\t<\/div>\n\t<\/div> \n<\/div><\/div>\n\t\t\t<\/div> \n\t\t<\/div>\n\t<\/div> \n<\/div><\/div>\n\t\t<div id=\"fws_6a502cc67a98c\"  data-midnight=\"dark\"  data-bg-mobile-hidden=\"\" class=\"wpb_row vc_row-fluid vc_row standard_section\"  style=\"padding-top: 0px; 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padding-bottom: calc(100vw * 0.06); \"><div class=\"row-bg-wrap\" data-bg-animation=\"none\"><div class=\"inner-wrap using-image\"><div class=\"row-bg using-image\"  style=\"background-image: url(https:\/\/melo.no\/wp-content\/uploads\/2020\/10\/Kalender.jpg); background-position: center center; background-repeat: no-repeat; \"><\/div><\/div><div class=\"row-bg-overlay\" style=\"background-color:rgba(10,6,6,0.84);  opacity: 0.5; \"><\/div><\/div><div class=\"col span_12 light left\">\n\t<div  class=\"vc_col-sm-12 wpb_column column_container vc_column_container col no-extra-padding\"  data-t-w-inherits=\"default\" data-border-radius=\"none\" data-shadow=\"none\" data-border-animation=\"\" data-border-animation-delay=\"\" data-border-width=\"none\" data-border-style=\"solid\" data-border-color=\"\" data-bg-cover=\"\" data-padding-pos=\"all\" data-has-bg-color=\"false\" data-bg-color=\"\" data-bg-opacity=\"1\" data-hover-bg=\"\" data-hover-bg-opacity=\"1\" data-animation=\"\" data-delay=\"0\" ><div class=\"column-bg-overlay\"><\/div>\n\t\t<div class=\"vc_column-inner\">\n\t\t\t<div class=\"wpb_wrapper\">\n\t\t\t\t<div id=\"fws_6a502cc67add0\" data-midnight=\"\" data-column-margin=\"default\" data-bg-mobile-hidden=\"\" class=\"wpb_row vc_row-fluid vc_row inner_row standard_section\"  style=\"padding-top: 0px; padding-bottom: 0px; \"><div class=\"row-bg-wrap\"> <div class=\"row-bg\"  style=\"\"><\/div> <\/div><div class=\"col span_12  left\">\n\t<div  class=\"vc_col-sm-2 wpb_column column_container vc_column_container col no-extra-padding\"   data-t-w-inherits=\"default\" data-shadow=\"none\" data-border-radius=\"none\" data-border-animation=\"\" data-border-animation-delay=\"\" data-border-width=\"none\" data-border-style=\"solid\" data-border-color=\"\" data-bg-cover=\"\" data-padding-pos=\"all\" data-has-bg-color=\"false\" data-bg-color=\"\" data-bg-opacity=\"1\" data-hover-bg=\"\" data-hover-bg-opacity=\"1\" data-animation=\"\" data-delay=\"0\"><div class=\"column-bg-overlay\"><\/div>\n\t\t<div class=\"vc_column-inner\">\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t\n\t\t<\/div> \n\t<\/div>\n\t<\/div> \n\n\t<div  class=\"vc_col-sm-8 wpb_column column_container vc_column_container col centered-text padding-2-percent\"   data-t-w-inherits=\"default\" data-shadow=\"none\" data-border-radius=\"none\" data-border-animation=\"\" data-border-animation-delay=\"\" data-border-width=\"none\" data-border-style=\"solid\" data-border-color=\"\" data-bg-cover=\"\" data-padding-pos=\"left-right\" data-has-bg-color=\"false\" data-bg-color=\"\" data-bg-opacity=\"1\" data-hover-bg=\"\" data-hover-bg-opacity=\"1\" data-animation=\"\" data-delay=\"0\"><div class=\"column-bg-overlay\"><\/div>\n\t\t<div class=\"vc_column-inner\">\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<h2 style=\"font-size: 40px;line-height: 52px;text-align: center\" class=\"vc_custom_heading wpb_animate_when_almost_visible wpb_fadeInUp fadeInUp\" >Any questions regarding contract law?<\/h2><div class=\"divider-wrap\" data-alignment=\"default\"><div style=\"height: 40px;\" class=\"divider\"><\/div><\/div><a class=\"nectar-button large see-through-3  has-icon wpb_animate_when_almost_visible wpb_zoomIn zoomIn\"  style=\"border-color: #d1b48d;\"  href=\"mailto:post@melo.no\" data-color-override=\"#d1b48d\" data-hover-color-override=\"false\" data-hover-text-color-override=\"#ffffff\"><span>Send us a non-binding inquiry<\/span><i  class=\"fa fa-arrow-down\"><\/i><\/a>\n\t\t<\/div> \n\t<\/div>\n\t<\/div> \n\n\t<div  class=\"vc_col-sm-2 wpb_column column_container vc_column_container col no-extra-padding\"   data-t-w-inherits=\"default\" data-shadow=\"none\" data-border-radius=\"none\" data-border-animation=\"\" data-border-animation-delay=\"\" data-border-width=\"none\" data-border-style=\"solid\" data-border-color=\"\" data-bg-cover=\"\" data-padding-pos=\"all\" data-has-bg-color=\"false\" data-bg-color=\"\" data-bg-opacity=\"1\" data-hover-bg=\"\" data-hover-bg-opacity=\"1\" data-animation=\"\" data-delay=\"0\"><div class=\"column-bg-overlay\"><\/div>\n\t\t<div class=\"vc_column-inner\">\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t\n\t\t<\/div> \n\t<\/div>\n\t<\/div> \n<\/div><\/div>\n\t\t\t<\/div> \n\t\t<\/div>\n\t<\/div> \n<\/div><\/div>","protected":false},"excerpt":{"rendered":"Et norsk selskap (Isola) hadde i en \u00e5rrekke produsert og solgt s\u00e5kalte frakoblingsmatter for et tysk selskap (Dural). Dural videresolgte mattene under sitt eget varemerke i Europa og USA. I...","protected":false},"author":188,"featured_media":6918,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_analytify_skip_tracking":false,"footnotes":""},"categories":[38],"tags":[],"class_list":["post-17731","post","type-post","status-publish","format-standard","has-post-thumbnail","category-kontrakt"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Ikke brudd p\u00e5 lojalitetsplikten i kontraktsforhold<\/title>\n<meta name=\"description\" content=\"H\u00f8yesterett avklarer lojalitetspliktens rekkevidde i kontraktsforhold, s\u00e6rlig i forretningsmessige forhold.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/melo.no\/en\/juridisk-innsikt\/kontrakt\/ikke-brudd-pa-lojalitetsplikten-i-kontraktsforhold\/\" \/>\n<meta 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