diff --git a/lib/vonage/verify2.rb b/lib/vonage/verify2.rb
index d4311986..fbbc006c 100644
--- a/lib/vonage/verify2.rb
+++ b/lib/vonage/verify2.rb
@@ -17,6 +17,7 @@ class Verify2 < Namespace
     #   )
     #
     # @param [required, String] :brand The brand that is sending the verification request
+    #   - Must be between 1 and 16 characters in length
     #
     # @param [required, Array<Hash>] :workflow An array of hashes for channels in the workflow
     #
@@ -32,6 +33,8 @@ class Verify2 < Namespace
     # @see https://developer.vonage.com/en/api/verify.v2#newRequest
     #
     def start_verification(brand:, workflow:, **opts)
+      raise ArgumentError, ':workflow must be a String' unless brand.is_a?(String)
+      raise ArgumentError, "Invalid 'brand' value #{brand}. Length must be between 1 and 16 characters." unless brand.length.between?(1, 16)
       raise ArgumentError, ':workflow must be an Array' unless workflow.is_a?(Array)
       raise ArgumentError, ':workflow must not be empty' if workflow.empty?
 
diff --git a/test/vonage/verify2_test.rb b/test/vonage/verify2_test.rb
index 5364a20d..f2aa08e3 100644
--- a/test/vonage/verify2_test.rb
+++ b/test/vonage/verify2_test.rb
@@ -77,7 +77,15 @@ def test_start_verification_method_without_brand
     end
   end
 
-  def test_start_verification_method_wit_brand_too_short
+  def test_start_verification_method_with_invalid_brand_type
+    workflow = [{channel: 'sms', to: to_number}]
+
+    assert_raises ArgumentError do
+      verify2.start_verification(brand: 123, workflow: workflow)
+    end
+  end
+
+  def test_start_verification_method_with_brand_too_short
     workflow = [{channel: 'sms', to: to_number}]
 
     assert_raises ArgumentError do
@@ -85,7 +93,7 @@ def test_start_verification_method_wit_brand_too_short
     end
   end
 
-  def test_start_verification_method_wit_brand_too_long
+  def test_start_verification_method_with_brand_too_long
     workflow = [{channel: 'sms', to: to_number}]
 
     assert_raises ArgumentError do