diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9f3ea41d6..b0c305d66 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## Unreleased
+
+### Added
+
+- Extended the validation message of the import functionality for transactions
+
 ## 1.61.0 - 15.10.2021
 
 ### Added
diff --git a/apps/api/src/app/import/import.service.ts b/apps/api/src/app/import/import.service.ts
index 4c7a99d33..59df401bd 100644
--- a/apps/api/src/app/import/import.service.ts
+++ b/apps/api/src/app/import/import.service.ts
@@ -94,7 +94,9 @@ export class ImportService {
       ]);
 
       if (result[symbol] === undefined) {
-        throw new Error(`${symbol} is not a valid symbol for ${dataSource}`);
+        throw new Error(
+          `orders.${index}.symbol ("${symbol}") is not valid for the specified data source ("${dataSource}")`
+        );
       }
     }
   }
diff --git a/apps/client/src/app/pages/portfolio/transactions/import-transaction-dialog/import-transaction-dialog.component.ts b/apps/client/src/app/pages/portfolio/transactions/import-transaction-dialog/import-transaction-dialog.component.ts
index f5ccf8f26..ac7832ff5 100644
--- a/apps/client/src/app/pages/portfolio/transactions/import-transaction-dialog/import-transaction-dialog.component.ts
+++ b/apps/client/src/app/pages/portfolio/transactions/import-transaction-dialog/import-transaction-dialog.component.ts
@@ -16,6 +16,8 @@ import { ImportTransactionDialogParams } from './interfaces/interfaces';
   templateUrl: 'import-transaction-dialog.html'
 })
 export class ImportTransactionDialog implements OnDestroy {
+  public details: any[] = [];
+
   private unsubscribeSubject = new Subject<void>();
 
   public constructor(
@@ -23,7 +25,19 @@ export class ImportTransactionDialog implements OnDestroy {
     public dialogRef: MatDialogRef<ImportTransactionDialog>
   ) {}
 
-  public ngOnInit() {}
+  public ngOnInit() {
+    for (const message of this.data.messages) {
+      if (message.includes('orders.')) {
+        let [index] = message.split(' ');
+        index = index.replace('orders.', '');
+        [index] = index.split('.');
+
+        this.details.push(this.data.orders[index]);
+      } else {
+        this.details.push('');
+      }
+    }
+  }
 
   public onCancel(): void {
     this.dialogRef.close();
diff --git a/apps/client/src/app/pages/portfolio/transactions/import-transaction-dialog/import-transaction-dialog.html b/apps/client/src/app/pages/portfolio/transactions/import-transaction-dialog/import-transaction-dialog.html
index 28e2a7f50..604eb7c06 100644
--- a/apps/client/src/app/pages/portfolio/transactions/import-transaction-dialog/import-transaction-dialog.html
+++ b/apps/client/src/app/pages/portfolio/transactions/import-transaction-dialog/import-transaction-dialog.html
@@ -6,14 +6,27 @@
 ></gf-dialog-header>
 
 <div class="flex-grow-1" mat-dialog-content>
-  <ul class="list-unstyled">
-    <li *ngFor="let message of data.messages" class="d-flex">
-      <div class="align-items-center d-flex px-2">
-        <ion-icon name="warning-outline"></ion-icon>
-      </div>
-      <div>{{ message }}</div>
-    </li>
-  </ul>
+  <mat-accordion displayMode="flat">
+    <mat-expansion-panel
+      *ngFor="let message of data.messages; let i = index"
+      [disabled]="!details[i]"
+    >
+      <mat-expansion-panel-header class="pl-1">
+        <mat-panel-title>
+          <div class="d-flex">
+            <div class="align-items-center d-flex mr-2">
+              <ion-icon name="warning-outline"></ion-icon>
+            </div>
+            <div>{{ message }}</div>
+          </div>
+        </mat-panel-title>
+      </mat-expansion-panel-header>
+      <pre
+        *ngIf="details[i]"
+        class="m-0"
+      ><code>{{ details[i] | json }}</code></pre>
+    </mat-expansion-panel>
+  </mat-accordion>
 </div>
 
 <gf-dialog-footer
diff --git a/apps/client/src/app/pages/portfolio/transactions/import-transaction-dialog/import-transaction-dialog.module.ts b/apps/client/src/app/pages/portfolio/transactions/import-transaction-dialog/import-transaction-dialog.module.ts
index b36158e25..4ce67d726 100644
--- a/apps/client/src/app/pages/portfolio/transactions/import-transaction-dialog/import-transaction-dialog.module.ts
+++ b/apps/client/src/app/pages/portfolio/transactions/import-transaction-dialog/import-transaction-dialog.module.ts
@@ -2,6 +2,7 @@ import { CommonModule } from '@angular/common';
 import { CUSTOM_ELEMENTS_SCHEMA, NgModule } from '@angular/core';
 import { MatButtonModule } from '@angular/material/button';
 import { MatDialogModule } from '@angular/material/dialog';
+import { MatExpansionModule } from '@angular/material/expansion';
 import { GfDialogFooterModule } from '@ghostfolio/client/components/dialog-footer/dialog-footer.module';
 import { GfDialogHeaderModule } from '@ghostfolio/client/components/dialog-header/dialog-header.module';
 
@@ -15,7 +16,8 @@ import { ImportTransactionDialog } from './import-transaction-dialog.component';
     GfDialogFooterModule,
     GfDialogHeaderModule,
     MatButtonModule,
-    MatDialogModule
+    MatDialogModule,
+    MatExpansionModule
   ],
   providers: [],
   schemas: [CUSTOM_ELEMENTS_SCHEMA]
diff --git a/apps/client/src/app/pages/portfolio/transactions/import-transaction-dialog/import-transaction-dialog.scss b/apps/client/src/app/pages/portfolio/transactions/import-transaction-dialog/import-transaction-dialog.scss
index 5d4e87f30..e2bb0960c 100644
--- a/apps/client/src/app/pages/portfolio/transactions/import-transaction-dialog/import-transaction-dialog.scss
+++ b/apps/client/src/app/pages/portfolio/transactions/import-transaction-dialog/import-transaction-dialog.scss
@@ -1,3 +1,12 @@
 :host {
   display: block;
+
+  .mat-expansion-panel {
+    background: none;
+    box-shadow: none;
+
+    .mat-expansion-panel-header {
+      color: inherit;
+    }
+  }
 }
diff --git a/apps/client/src/app/pages/portfolio/transactions/import-transaction-dialog/interfaces/interfaces.ts b/apps/client/src/app/pages/portfolio/transactions/import-transaction-dialog/interfaces/interfaces.ts
index 4041054eb..3800514a6 100644
--- a/apps/client/src/app/pages/portfolio/transactions/import-transaction-dialog/interfaces/interfaces.ts
+++ b/apps/client/src/app/pages/portfolio/transactions/import-transaction-dialog/interfaces/interfaces.ts
@@ -1,4 +1,5 @@
 export interface ImportTransactionDialogParams {
   deviceType: string;
   messages: string[];
+  orders: any[];
 }
diff --git a/apps/client/src/app/pages/portfolio/transactions/transactions-page.component.ts b/apps/client/src/app/pages/portfolio/transactions/transactions-page.component.ts
index 81186cc2d..ac73a8102 100644
--- a/apps/client/src/app/pages/portfolio/transactions/transactions-page.component.ts
+++ b/apps/client/src/app/pages/portfolio/transactions/transactions-page.component.ts
@@ -197,7 +197,7 @@ export class TransactionsPageComponent implements OnDestroy, OnInit {
 
               this.handleImportSuccess();
             } catch (error) {
-              this.handleImportError(error);
+              this.handleImportError({ error, orders: content.orders });
             }
 
             return;
@@ -212,7 +212,10 @@ export class TransactionsPageComponent implements OnDestroy, OnInit {
               this.handleImportSuccess();
             } catch (error) {
               this.handleImportError({
-                error: { message: error?.error?.message ?? [error?.message] }
+                error: {
+                  error: { message: error?.error?.message ?? [error?.message] }
+                },
+                orders: error?.orders ?? []
               });
             }
 
@@ -221,7 +224,10 @@ export class TransactionsPageComponent implements OnDestroy, OnInit {
 
           throw new Error();
         } catch (error) {
-          this.handleImportError({ error: { message: ['Unexpected format'] } });
+          this.handleImportError({
+            error: { error: { message: ['Unexpected format'] } },
+            orders: []
+          });
         }
       };
     };
@@ -307,13 +313,14 @@ export class TransactionsPageComponent implements OnDestroy, OnInit {
     a.click();
   }
 
-  private handleImportError(aError: any) {
+  private handleImportError({ error, orders }: { error: any; orders: any[] }) {
     this.snackBar.dismiss();
 
     this.dialog.open(ImportTransactionDialog, {
       data: {
+        orders,
         deviceType: this.deviceType,
-        messages: aError?.error?.message
+        messages: error?.error?.message
       },
       width: this.deviceType === 'mobile' ? '100vw' : '50rem'
     });
diff --git a/apps/client/src/app/services/import-transactions.service.ts b/apps/client/src/app/services/import-transactions.service.ts
index dad503350..ac1b88f9d 100644
--- a/apps/client/src/app/services/import-transactions.service.ts
+++ b/apps/client/src/app/services/import-transactions.service.ts
@@ -39,17 +39,17 @@ export class ImportTransactionsService {
 
     const orders: CreateOrderDto[] = [];
 
-    for (const item of content) {
+    for (const [index, item] of content.entries()) {
       orders.push({
         accountId: defaultAccountId,
-        currency: this.parseCurrency(item),
+        currency: this.parseCurrency({ content, index, item }),
         dataSource: primaryDataSource,
-        date: this.parseDate(item),
-        fee: this.parseFee(item),
-        quantity: this.parseQuantity(item),
-        symbol: this.parseSymbol(item),
-        type: this.parseType(item),
-        unitPrice: this.parseUnitPrice(item)
+        date: this.parseDate({ content, index, item }),
+        fee: this.parseFee({ content, index, item }),
+        quantity: this.parseQuantity({ content, index, item }),
+        symbol: this.parseSymbol({ content, index, item }),
+        type: this.parseType({ content, index, item }),
+        unitPrice: this.parseUnitPrice({ content, index, item })
       });
     }
 
@@ -90,8 +90,16 @@ export class ImportTransactionsService {
     }, {});
   }
 
-  private parseCurrency(aItem: any) {
-    const item = this.lowercaseKeys(aItem);
+  private parseCurrency({
+    content,
+    index,
+    item
+  }: {
+    content: any[];
+    index: number;
+    item: any;
+  }) {
+    item = this.lowercaseKeys(item);
 
     for (const key of ImportTransactionsService.CURRENCY_KEYS) {
       if (item[key]) {
@@ -99,11 +107,19 @@ export class ImportTransactionsService {
       }
     }
 
-    throw new Error('Could not parse currency');
+    throw { message: `orders.${index}.currency is not valid`, orders: content };
   }
 
-  private parseDate(aItem: any) {
-    const item = this.lowercaseKeys(aItem);
+  private parseDate({
+    content,
+    index,
+    item
+  }: {
+    content: any[];
+    index: number;
+    item: any;
+  }) {
+    item = this.lowercaseKeys(item);
     let date: string;
 
     for (const key of ImportTransactionsService.DATE_KEYS) {
@@ -122,11 +138,19 @@ export class ImportTransactionsService {
       }
     }
 
-    throw new Error('Could not parse date');
+    throw { message: `orders.${index}.date is not valid`, orders: content };
   }
 
-  private parseFee(aItem: any) {
-    const item = this.lowercaseKeys(aItem);
+  private parseFee({
+    content,
+    index,
+    item
+  }: {
+    content: any[];
+    index: number;
+    item: any;
+  }) {
+    item = this.lowercaseKeys(item);
 
     for (const key of ImportTransactionsService.FEE_KEYS) {
       if ((item[key] || item[key] === 0) && isNumber(item[key])) {
@@ -134,11 +158,19 @@ export class ImportTransactionsService {
       }
     }
 
-    throw new Error('Could not parse fee');
+    throw { message: `orders.${index}.fee is not valid`, orders: content };
   }
 
-  private parseQuantity(aItem: any) {
-    const item = this.lowercaseKeys(aItem);
+  private parseQuantity({
+    content,
+    index,
+    item
+  }: {
+    content: any[];
+    index: number;
+    item: any;
+  }) {
+    item = this.lowercaseKeys(item);
 
     for (const key of ImportTransactionsService.QUANTITY_KEYS) {
       if (item[key] && isNumber(item[key])) {
@@ -146,11 +178,19 @@ export class ImportTransactionsService {
       }
     }
 
-    throw new Error('Could not parse quantity');
+    throw { message: `orders.${index}.quantity is not valid`, orders: content };
   }
 
-  private parseSymbol(aItem: any) {
-    const item = this.lowercaseKeys(aItem);
+  private parseSymbol({
+    content,
+    index,
+    item
+  }: {
+    content: any[];
+    index: number;
+    item: any;
+  }) {
+    item = this.lowercaseKeys(item);
 
     for (const key of ImportTransactionsService.SYMBOL_KEYS) {
       if (item[key]) {
@@ -158,11 +198,19 @@ export class ImportTransactionsService {
       }
     }
 
-    throw new Error('Could not parse symbol');
+    throw { message: `orders.${index}.symbol is not valid`, orders: content };
   }
 
-  private parseType(aItem: any) {
-    const item = this.lowercaseKeys(aItem);
+  private parseType({
+    content,
+    index,
+    item
+  }: {
+    content: any[];
+    index: number;
+    item: any;
+  }) {
+    item = this.lowercaseKeys(item);
 
     for (const key of ImportTransactionsService.TYPE_KEYS) {
       if (item[key]) {
@@ -174,11 +222,19 @@ export class ImportTransactionsService {
       }
     }
 
-    throw new Error('Could not parse type');
+    throw { message: `orders.${index}.type is not valid`, orders: content };
   }
 
-  private parseUnitPrice(aItem: any) {
-    const item = this.lowercaseKeys(aItem);
+  private parseUnitPrice({
+    content,
+    index,
+    item
+  }: {
+    content: any[];
+    index: number;
+    item: any;
+  }) {
+    item = this.lowercaseKeys(item);
 
     for (const key of ImportTransactionsService.UNIT_PRICE_KEYS) {
       if (item[key] && isNumber(item[key])) {
@@ -186,7 +242,10 @@ export class ImportTransactionsService {
       }
     }
 
-    throw new Error('Could not parse unit price (unitPrice)');
+    throw {
+      message: `orders.${index}.unitPrice is not valid`,
+      orders: content
+    };
   }
 
   private postImport(aImportData: { orders: CreateOrderDto[] }) {
diff --git a/libs/common/src/lib/interfaces/info-item.interface.ts b/libs/common/src/lib/interfaces/info-item.interface.ts
index 35061cc75..630b37403 100644
--- a/libs/common/src/lib/interfaces/info-item.interface.ts
+++ b/libs/common/src/lib/interfaces/info-item.interface.ts
@@ -1,4 +1,5 @@
 import { DataSource } from '@prisma/client';
+
 import { Statistics } from './statistics.interface';
 import { Subscription } from './subscription.interface';