diff --git a/src/api/entities/SecurityToken/Documents.ts b/src/api/entities/SecurityToken/Documents.ts
index d477e27b35..3d021203d2 100644
--- a/src/api/entities/SecurityToken/Documents.ts
+++ b/src/api/entities/SecurityToken/Documents.ts
@@ -9,7 +9,9 @@ import { SecurityToken } from './';
  */
 export class Documents extends Namespace<SecurityToken> {
   /**
-   * Assign a new list of documents to the Security Token. This replaces the existing list of documents with the one passed in the parameters
+   * Assign a new list of documents to the Security Token by replacing the existing list of documents with the one passed in the parameters
+   *
+   * This requires two transactions
    *
    * @param args.documents - new list of documents
    */
diff --git a/src/api/entities/SecurityToken/index.ts b/src/api/entities/SecurityToken/index.ts
index 89be371885..53a4f26c9b 100644
--- a/src/api/entities/SecurityToken/index.ts
+++ b/src/api/entities/SecurityToken/index.ts
@@ -50,6 +50,7 @@ export class SecurityToken extends Entity<UniqueIdentifiers> {
   public ticker: string;
 
   // Namespaces
+
   public documents: Documents;
 
   /**
diff --git a/src/api/procedures/setTokenDocuments.ts b/src/api/procedures/setTokenDocuments.ts
index 4f5019b638..f37f3d740c 100644
--- a/src/api/procedures/setTokenDocuments.ts
+++ b/src/api/procedures/setTokenDocuments.ts
@@ -52,7 +52,7 @@ export async function prepareSetTokenDocuments(
 
   if (
     !differenceWith(currentDocs, rawDocuments, comparator).length &&
-    !differenceWith(rawDocuments, currentDocs, comparator).length
+    currentDocs.length === rawDocuments.length
   ) {
     throw new PolymeshError({
       code: ErrorCode.ValidationError,