diff --git a/public/scripts/cookie-test.js b/public/scripts/cookie-test.js
new file mode 100644
index 0000000000000..56f4c744e06b9
--- /dev/null
+++ b/public/scripts/cookie-test.js
@@ -0,0 +1,207 @@
+/* utility functions */
+const getDomain = () => {
+  const domain = location.hostname;
+
+  if (domain.includes("deriv.com")) {
+    return "deriv.com";
+  }
+
+  return domain.includes("binary.sx") ? "binary.sx" : domain;
+};
+
+const eraseCookie = (name) => {
+  document.cookie = `${name}=; Max-Age=-99999999; domain=${getDomain()}; path=/;`;
+};
+
+const getCookie = (name) => {
+  const dc = document.cookie;
+  const prefix = name + "=";
+
+  // check begin index
+  let begin = dc.indexOf("; " + prefix);
+  if (begin == -1) {
+    begin = dc.indexOf(prefix);
+    // cookie not available
+    if (begin != 0) return null;
+  } else {
+    begin += 2;
+  }
+
+  // check end index
+  let end = document.cookie.indexOf(";", begin);
+  if (end == -1) {
+    end = dc.length;
+  }
+
+  return decodeURI(dc.substring(begin + prefix.length, end));
+};
+
+const isMobile = () => {
+  return /Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(
+    navigator.userAgent
+  );
+};
+
+const toISOFormat = (date) => {
+  if (date instanceof Date) {
+    const utc_year = date.getUTCFullYear();
+    const utc_month =
+      (date.getUTCMonth() + 1 < 10 ? "0" : "") + (date.getMonth() + 1);
+    const utc_date = (date.getUTCDate() < 10 ? "0" : "") + date.getUTCDate();
+
+    return `${utc_year}-${utc_month}-${utc_date}`;
+  }
+
+  return "";
+};
+
+const shouldOverwrite = (new_utm_data, current_utm_data) => {
+  // If we don't have old utm data, the utm_source field is enough for new utm data
+  const valid_new_utm_source = new_utm_data.utm_source && new_utm_data.utm_source !== "null"
+  if (!current_utm_data && valid_new_utm_source) {
+    return true;
+  }
+
+  // If we have old utm data, 3 fields are required for new utm data to rewrite the old one
+  const required_fields = ["utm_source", "utm_medium", "utm_campaign"];
+  const has_new_required_fields = required_fields.every(
+    (field) => new_utm_data[field]
+  );
+  if (has_new_required_fields) {
+    return true;
+  }
+
+  // Otherwise we don't rewrite the old utm_data
+  return false;
+};
+/* end utility functions */
+
+(function initMarketingCookies() {
+  const searchParams = new URLSearchParams(window.location.search);
+  const brand_name = "deriv";
+  const app_id = 11780;
+
+  /* start handling UTMs */
+  const utm_fields = [
+    "utm_source",
+    "utm_medium",
+    "utm_campaign",
+    "utm_term",
+    "utm_content",
+    "utm_ad_id",
+    "utm_click_id",
+    "utm_adgroup_id",
+    "utm_campaign_id",
+  ];
+
+  let utm_data = {};
+  const current_utm_data = JSON.parse(decodeURIComponent(getCookie("utm_data")));
+
+  // If the user comes to the site for the first time without any URL params
+  // Only set the utm_source to referrer if the user does not have utm_data cookies stored
+  if (!current_utm_data?.utm_source) {
+    utm_data = {
+      utm_source: document.referrer ? document.referrer : "null",
+    };
+  }
+
+  // If the user has any new UTM params, store them
+  utm_fields.forEach((field) => {
+    if (searchParams.has(field)) {
+      utm_data[field] = searchParams
+        .get(field)
+        .substring(0, 100); // Limit to 100 supported characters
+    }
+  });
+
+  if (shouldOverwrite(utm_data, current_utm_data)) {
+    eraseCookie("affiliate_tracking");
+    eraseCookie("utm_data");
+
+    const utm_data_cookie = encodeURIComponent(JSON.stringify(utm_data))
+      .replaceAll("%2C", ",")
+      .replaceAll("%7B", "{")
+      .replaceAll("%7D", "}");
+
+    // Non-expiring cookie for utm_data
+    // Max 400 days
+    document.cookie = `utm_data=${utm_data_cookie}; expires=Tue, 19 Jan 9999 03:14:07 UTC; domain=${getDomain()}; path=/; SameSite=None; Secure;`;
+  }
+
+  /* end handling UTMs */
+
+  /* start handling affiliate tracking */
+  if (searchParams.has("t")) {
+    eraseCookie("affiliate_tracking");
+    document.cookie = `affiliate_tracking=${searchParams.get(
+      "t"
+    )}; expires=Tue, 19 Jan 9999 03:14:07 UTC;  domain=${getDomain()}; path=/; SameSite=None; Secure;`;
+  }
+  /* end handling affiliate tracking */
+
+  /* start handling signup device */
+  const signup_device_cookie_unparsed = getCookie("signup_device") || "{}";
+  const signup_device_cookie = JSON.parse(
+    decodeURI(signup_device_cookie_unparsed).replaceAll("%2C", ",")
+  );
+  if (!signup_device_cookie.signup_device) {
+    const signup_data = {
+      signup_device: isMobile() ? "mobile" : "desktop",
+    };
+    const signup_data_cookie = encodeURI(JSON.stringify(signup_data))
+      .replace(",", "%2C")
+      .replace("%7B", "{")
+      .replace("%7D", "}");
+
+    document.cookie = `signup_device=${signup_data_cookie};domain=${getDomain()}; path=/; SameSite=None; Secure;`;
+  }
+  /* end handling signup device */
+
+  /* start handling date first contact */
+  const date_first_contact_cookie_unparsed =
+    getCookie("date_first_contact") || "{}";
+  const date_first_contact_cookie = JSON.parse(
+    decodeURI(date_first_contact_cookie_unparsed).replaceAll("%2C", ",")
+  );
+
+  if (!date_first_contact_cookie.date_first_contact) {
+    const ws = new WebSocket(
+      `wss://green.binaryws.com/websockets/v3?app_id=${app_id}&brand=${brand_name}`
+    );
+
+    ws.onopen = function (evt) {
+      ws.send(JSON.stringify({ time: 1 }));
+    };
+
+    ws.onmessage = function (msg) {
+      const date_first_contact_response = JSON.parse(msg.data);
+
+      const date_first_contact_data = {
+        date_first_contact: toISOFormat(
+          new Date(date_first_contact_response.time * 1000)
+        ),
+      };
+
+      const date_first_contact_data_cookie = encodeURI(
+        JSON.stringify(date_first_contact_data)
+      )
+        .replace(",", "%2C")
+        .replace("%7B", "{")
+        .replace("%7D", "}");
+
+      document.cookie = `date_first_contact=${date_first_contact_data_cookie};domain=${getDomain()}; path=/; SameSite=None; Secure;`;
+
+      ws.close();
+    };
+  }
+  /* end handling date first contact */
+
+  /* start handling gclid */
+  if (searchParams.has("gclid")) {
+    eraseCookie("gclid");
+    document.cookie = `gclid=${searchParams.get(
+      "gclid"
+    )};domain=${getDomain()}; path=/; SameSite=None; Secure;`;
+  }
+  /* end handling gclid */
+})();
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