diff --git a/box/apis/v2/management/ebics_users.rb b/box/apis/v2/management/ebics_users.rb
index b666e58..5142ad9 100644
--- a/box/apis/v2/management/ebics_users.rb
+++ b/box/apis/v2/management/ebics_users.rb
@@ -22,9 +22,6 @@ class EbicsUsers < Grape::API
           content_type :html, "text/html"
 
           namespace "/management/accounts/:iban" do
-            params do
-              requires :iban, type: String, desc: "IBAN for the account"
-            end
             before do
               unless env["box.admin"]
                 error!({message: "Unauthorized access. Please provide a valid organization management token!"}, 401)
@@ -35,11 +32,6 @@ class EbicsUsers < Grape::API
               error!({message: "Your organization does not have an account with given IBAN!"}, 404)
             end
 
-            desc "Service", hidden: true
-            get "/" do
-              {message: "not yet implemented"}
-            end
-
             resource :ebics_users do
               ###
               ### GET /management/accounts/DExx/ebics_users/1/ini_letter
@@ -86,7 +78,9 @@ class EbicsUsers < Grape::API
                 produces: ["application/vnd.ebicsbox-v2+json"]
 
               params do
+                requires :iban, type: String, desc: "IBAN for the account"
               end
+
               get do
                 present @account.ebics_users, with: Entities::EbicsUser
               end
@@ -103,6 +97,7 @@ class EbicsUsers < Grape::API
                 produces: ["application/vnd.ebicsbox-v2+json"]
 
               params do
+                requires :iban, type: String, desc: "IBAN for the account"
                 requires :user_id, type: Integer, desc: "Internal user identifier to associate the ebics_user with", documentation: {param_type: "body"}
                 requires :ebics_user, type: String, unique_ebics_user: true, desc: "EBICS user to represent"
               end