diff --git a/examples/card-form/index.html b/examples/card-form/index.html
index cf26b62c..ddb4de28 100644
--- a/examples/card-form/index.html
+++ b/examples/card-form/index.html
@@ -25,8 +25,19 @@
             data-processout-placeholder="CVC"
           ></div>
         </div>
-        <button type="submit" class="submit-button">Pay</button>
-        <div className="form-messages">
+        <!-- Combo Card Types Section -->
+        <div id="combo-card-types" style="display: none; margin-top: 20px;">
+          <h3>Combo Card Types</h3>
+          <div id="combo-card-radio-group" style="margin-top: 10px;">
+            <!-- Radio buttons will be dynamically added here -->
+          </div>
+        </div>
+        <div class="form-input-group">
+          <button type="submit" class="submit-button">
+            Pay
+          </button>
+        </div>
+        <div class="form-messages">
           <div id="errors"></div>
           <div id="success"></div>
         </div>
@@ -36,7 +47,7 @@
     <script>
       document.addEventListener("DOMContentLoaded", function () {
         // You need to replace these values with your own
-        const projectId = "test-proj_qEi1u5BwoYcZb6mOMKDWIm4mpqKCq6bN"
+        const projectId = "proj_2ra13ORom2dWhiL6DUgMTdmJAwnOW6Ym"
         const invoiceId = "iv_5pKzE0HKcubbPLklZ7iAHvN2LThuzx8j"
 
         const client = new ProcessOut.ProcessOut(projectId)
@@ -53,6 +64,67 @@
             },
           },
           function (form) {
+            // Test with a dummy card number string
+            const dummyCardNumber = "4242424242424242";
+            console.log("Testing getIINDetails with dummy number:", dummyCardNumber);
+            client.getIINDetails(dummyCardNumber, function (response) {
+              console.log("IIN Details Response with dummy number:", response)
+              
+              // Handle combo card types if available
+              if (response.card_information && response.card_information.combo_card_types) {
+                console.log("displayingggg")
+                displayComboCardTypes(response.card_information.combo_card_types);
+              }
+            }, function (err) {
+              console.log("IIN Details Error with dummy number:", err)
+            })
+
+            // For testing: Always display dummy combo card types
+            const dummyComboTypes = ["prepaid", "debit"];
+            displayComboCardTypes(dummyComboTypes);
+
+            // Function to display combo card types
+            function displayComboCardTypes(comboTypes) {
+              const comboSection = document.getElementById("combo-card-types");
+              const comboRadioGroup = document.getElementById("combo-card-radio-group");
+              
+              // Clear existing radio buttons
+              comboRadioGroup.innerHTML = "";
+              
+              // Add radio buttons for each combo card type
+              comboTypes.forEach(function(type) {
+                const radioDiv = document.createElement("div");
+                radioDiv.style.marginBottom = "10px";
+                
+                const radio = document.createElement("input");
+                radio.type = "radio";
+                radio.name = "combo_card_type"; // Group all radio buttons
+                radio.value = type;
+                radio.id = `combo-card-${type}`;
+                
+                const label = document.createElement("label");
+                label.htmlFor = `combo-card-${type}`;
+                label.textContent = type.charAt(0).toUpperCase() + type.slice(1); // Capitalize first letter
+                label.style.marginLeft = "8px";
+                label.style.cursor = "pointer";
+                
+                radioDiv.appendChild(radio);
+                radioDiv.appendChild(label);
+                comboRadioGroup.appendChild(radioDiv);
+              });
+              
+              // Show the section
+              comboSection.style.display = "block";
+              
+              console.log("Combo card types displayed:", comboTypes);
+            }
+
+            // Function to get the selected combo card type
+            function getSelectedComboCardType() {
+              const selectedRadio = document.querySelector('input[name="combo_card_type"]:checked');
+              return selectedRadio ? selectedRadio.value : null;
+            }
+
             form.getNumberField().on("focus", function (e) {
               document.getElementById("errors").innerHTML = ""
             })
@@ -68,11 +140,16 @@
             form.addEventListener("submit", function (e) {
               e.preventDefault()
 
+              // Get the selected combo card type
+              const selectedComboType = getSelectedComboCardType();
+              console.log("Selected combo card type:", selectedComboType);
+
               client.tokenize(
                 form,
                 {
                   name: document.getElementById("card-form-name").value,
                   zip: "10018",
+                  preferred_card_type: selectedComboType // Pass the selected combo card type
                 },
                 function (token) {
                   console.log("Tokenization Success", token)
diff --git a/src/processout/cardfield.ts b/src/processout/cardfield.ts
index c1ec5741..85128e9b 100644
--- a/src/processout/cardfield.ts
+++ b/src/processout/cardfield.ts
@@ -521,6 +521,7 @@ module ProcessOut {
 
             window.addEventListener("message", function (event) {
                 var data = Message.parseEvent(event);
+                console.log("CardField tokenize response - data:", data);
                 if (data.messageID != id)
                     return;
                 if (data.action != "tokenize")
@@ -596,5 +597,18 @@ module ProcessOut {
                     return Translator.translateMessage("cardfield.title")
             }
         }
+
+        /**
+         * getIINDetails retrieves the IIN details using the IINDetails class
+         * @param {Callback} success
+         * @param {Callback} error
+         * @return {Promise<IINDetailsResponse>} Promise that resolves to the IIN details response
+         */
+        public getIINDetails(success: (data: IINDetailsResponse) => void,
+                            error: (err: Exception) => void): Promise<IINDetailsResponse> {
+            // Create an instance of IINDetails and delegate to it
+            const iinDetails = new IINDetails(this.instance);
+            return iinDetails.getIINDetails("", success, error);
+        }
     }
 }
diff --git a/src/processout/cardform.ts b/src/processout/cardform.ts
index f84b2a2b..393edc3a 100644
--- a/src/processout/cardform.ts
+++ b/src/processout/cardform.ts
@@ -355,5 +355,23 @@ module ProcessOut {
 
             this.cvc.refreshCVC(cardUID, success, error);
         }
+
+        /**
+         * getIINDetails retrieves the IIN details using the number field
+         * and calls the success callback with the IIN details when successful.
+         * If an error arises, the error callback is called
+         * @param {Callback} success
+         * @param {Callback} error
+         * @return {Promise<IINDetailsResponse>} Promise that resolves to the IIN details response
+         */
+        public getIINDetails(success: (data: IINDetailsResponse) => void,
+                            error: (err: Exception) => void): Promise<IINDetailsResponse> {
+
+            if (!this.number)
+                error(new Exception("processout-js.wrong-type-for-action", 
+                    "getIINDetails was called but the form has no number field initialized."));
+
+            return this.number.getIINDetails(success, error);
+        }
     }
 }
diff --git a/src/processout/iindetails.ts b/src/processout/iindetails.ts
new file mode 100644
index 00000000..9f985888
--- /dev/null
+++ b/src/processout/iindetails.ts
@@ -0,0 +1,134 @@
+/// <reference path="../references.ts" />
+
+module ProcessOut {
+    /**
+     * CardInformation interface represents the card information returned by the IIN details API
+     */
+    export interface CardInformation {
+        bank_name: string;
+        brand: string;
+        category: string;
+        co_scheme: string | null;
+        combo_card_types: string | null;
+        country: string;
+        scheme: string;
+        type: string;
+    }
+
+    /**
+     * IINDetailsResponse interface represents the complete response from the IIN details API
+     */
+    export interface IINDetailsResponse {
+        card_information: CardInformation;
+        success: boolean;
+    }
+
+    /**
+     * IINDetails class for handling IIN (Issuer Identification Number) details
+     * and API calls to retrieve card information based on IIN numbers.
+     */
+    export class IINDetails {
+        /**
+         * ProcessOut instance
+         * @var {ProcessOut}
+         */
+        protected instance: ProcessOut;
+
+        /**
+         * IINDetails constructor.
+         * @param {ProcessOut} instance
+         */
+        public constructor(instance: ProcessOut) {
+            this.instance = instance;
+        }
+
+        /**
+         * getIINDetails retrieves the IIN (Issuer Identification Number) details
+         * for a given card number string. The IIN is truncated to 6 digits for lookup.
+         * @param {string} cardNumber
+         * @param {callback} success
+         * @param {callback} error
+         * @return {Promise<IINDetailsResponse>} Promise that resolves to the IIN details response
+         */
+        public getIINDetails(
+            cardNumber: string,
+            success?: (data: IINDetailsResponse) => void,
+            error?: (err: Exception) => void
+        ): Promise<IINDetailsResponse> {
+            return new Promise((resolve, reject) => {
+                // Add a timeout to detect if the Promise hangs
+                const timeoutId = setTimeout(() => {
+                    const timeoutException = new Exception("processout-js.iin-timeout", 
+                        "IIN details request timed out");
+                    reject(timeoutException);
+                    if (error) error(timeoutException);
+                }, 10000); // 10 second timeout
+                
+                // Validate the IIN number first
+                if (!this.validateIIN(cardNumber)) {
+                    clearTimeout(timeoutId);
+                    const exception = new Exception("processout-js.iin-invalid-length", 
+                        "IIN number must be more than 6 digits.");
+                    reject(exception);
+                    if (error) error(exception);
+                    return;
+                }
+
+                // Truncate the IIN number to appropriate length
+                const truncatedIIN = this.truncateIIN(cardNumber);
+                if (!truncatedIIN) {
+                    clearTimeout(timeoutId);
+                    const exception = new Exception("processout-js.iin-invalid-length", 
+                        "Failed to truncate IIN number.");
+                    reject(exception);
+                    if (error) error(exception);
+                    return;
+                }
+
+                // Make API request to get IIN details using ProcessOut apiRequest with basicAuth disabled
+                // Use the same URL pattern as tokenize method: "iins/{iin}" instead of "/iins/{iin}"
+                const iinPath = `iins/${truncatedIIN}`;
+                this.instance.apiRequest("get", iinPath, {}, 
+                    function(data: IINDetailsResponse, req: XMLHttpRequest, e: Event): void {
+                        clearTimeout(timeoutId);
+                        resolve(data);
+                        if (success) success(data);
+                    }, 
+                    function(req: XMLHttpRequest, e: Event, errorCode: any): void {
+                        clearTimeout(timeoutId);
+                        const exception = new Exception("processout-js.iin-details-error", 
+                            "Failed to retrieve IIN details.");
+                        reject(exception);
+                        if (error) error(exception);
+                    },
+                    undefined, // retry parameter
+                    { 
+                        isLegacy: false,
+                        basicAuth: false
+                    } // disable basic auth for this endpoint
+                );
+            });
+        }
+
+        /**
+         * validateIIN validates that the IIN number has sufficient length for processing
+         * @param {string} iinNumber
+         * @return {boolean} true if valid, false otherwise
+         */
+        public validateIIN(iinNumber: string): boolean {
+            return iinNumber.length >= 6;
+        }
+
+        /**
+         * truncateIIN truncates the IIN number to the appropriate length for API lookup
+         * @param {string} iinNumber
+         * @return {string | null} truncated IIN number or null if invalid
+         */
+        public truncateIIN(iinNumber: string): string | null {
+            if (iinNumber.length >= 6) {
+                return iinNumber.substring(0, 6);
+            }
+            return null;
+        }
+    }
+}
diff --git a/src/processout/processout.ts b/src/processout/processout.ts
index c8272cee..c5d4be36 100644
--- a/src/processout/processout.ts
+++ b/src/processout/processout.ts
@@ -11,6 +11,7 @@ interface Window {
 interface apiRequestOptions {
   isLegacy?: boolean
   clientSecret?: string
+  basicAuth?: boolean
 }
 
 /**
@@ -302,6 +303,7 @@ module ProcessOut {
 
       method = method.toLowerCase()
 
+      const basicAuth = options && options.basicAuth !== undefined ? options.basicAuth : true
       const isLegacy = options && options.isLegacy !== undefined ? options.isLegacy : true
       const clientSecret =
         options && options.clientSecret !== undefined ? options.clientSecret : null
@@ -319,7 +321,7 @@ module ProcessOut {
 
       if (SCRIPT_VERSION) customHeaders["ProcessOut-JS-Version"] = SCRIPT_VERSION
 
-      if (this.projectID) headers["Authorization"] = `Basic ${btoa(this.projectID + ":")}`
+      if (this.projectID && basicAuth) headers["Authorization"] = `Basic ${btoa(this.projectID + ":")}`
 
       // We need the data to at least be an empty object
       if (!data) data = {}
@@ -550,6 +552,60 @@ module ProcessOut {
       )
     }
 
+    /**
+     * getIINDetails retrieves the IIN details
+     * for a given card form or card number. The IIN is truncated to 6 digits
+     * for lookup. If a CardForm is provided, attempts to extract the card number
+     * from the form's number field.
+     * @param  {CardForm | string} cardFormOrNumber
+     * @param  {callback} success
+     * @param  {callback} error
+     * @return {Promise<IINDetailsResponse>} Promise that resolves to the IIN details response containing card_information and success
+     */
+    public getIINDetails(
+      cardFormOrNumber: CardForm | string,
+      success: (data: IINDetailsResponse) => void,
+      error: (err: Exception) => void,
+    ): Promise<IINDetailsResponse> {
+      if (cardFormOrNumber instanceof CardForm)
+        return this.getIINDetailsForm(<CardForm>cardFormOrNumber, success, error)
+
+      return this.getIINDetailsString(<string>cardFormOrNumber, success, error)
+    }
+
+    /**
+     * getIINDetailsForm retrieves the IIN details using the given form to
+     * fetch the card number value
+     * @param  {CardForm} form
+     * @param  {callback} success
+     * @param  {callback} error
+     * @return {Promise<IINDetailsResponse>} Promise that resolves to the IIN details response
+     */
+    protected getIINDetailsForm(
+      form: CardForm,
+      success: (data: IINDetailsResponse) => void,
+      error: (err: Exception) => void,
+    ): Promise<IINDetailsResponse> {
+      return form.getIINDetails(success, error);
+    }
+
+    /**
+     * getIINDetailsString retrieves the IIN details for the given card number string
+     * @param  {string}   cardNumber
+     * @param  {callback} success
+     * @param  {callback} error
+     * @return {Promise<IINDetailsResponse>} Promise that resolves to the IIN details response
+     */
+    protected getIINDetailsString(
+      cardNumber: string,
+      success: (data: IINDetailsResponse) => void,
+      error: (err: Exception) => void,
+    ): Promise<IINDetailsResponse> {
+      // Create an instance of IINDetails and delegate to it
+      const iinDetails = new IINDetails(this);
+      return iinDetails.getIINDetails(cardNumber, success, error);
+    }
+
     /**
      * tokenizePaymentToken takes the payment token payload
      * and encodes in base64. Then it creates a ProcessOut
@@ -696,6 +752,7 @@ module ProcessOut {
       success: (token: string, card: Card) => void,
       error: (err: Exception) => void,
     ): void {
+      console.log("tokenizeForm response - form:", form, "data:", data);
       form.validate(
         function () {
           form.tokenize(data, success, error)
diff --git a/src/processout/references.ts b/src/processout/references.ts
index 46853694..b9722fc4 100644
--- a/src/processout/references.ts
+++ b/src/processout/references.ts
@@ -8,6 +8,7 @@
 /// <reference path="card.ts" />
 /// <reference path="cardfield.ts" />
 /// <reference path="cardform.ts" />
+/// <reference path="iindetails.ts" />
 /// <reference path="translator.ts" />
 /// <reference path="exception.ts" />
 /// <reference path="processout.ts" />