diff --git a/app/components/add-expense-item/component.js b/app/components/add-expense-item/component.js
index 72790e6..a2022ba 100644
--- a/app/components/add-expense-item/component.js
+++ b/app/components/add-expense-item/component.js
@@ -81,7 +81,9 @@ export default class AddExpenseItemComponent extends Component {
     }
 
     if (isPresent(this.tags)) {
-      expense.tags = this.tags.split(',').map(t => t.trim());
+      expense.tags = this.tags.split(',')
+                              .map(t => t.trim())
+                              .filter(t => t.length > 0);
     }
 
     this.args.addExpenseItem(expense);
diff --git a/app/components/add-reimbursement/component.js b/app/components/add-reimbursement/component.js
index fd00dea..5fc0397 100644
--- a/app/components/add-reimbursement/component.js
+++ b/app/components/add-reimbursement/component.js
@@ -6,6 +6,7 @@ import { action } from '@ember/object';
 import { A } from '@ember/array';
 import { scheduleOnce } from '@ember/runloop';
 import isValidAmount from 'kredits-web/utils/is-valid-amount';
+import readFileContent from 'kredits-web/utils/read-file-content';
 import config from 'kredits-web/config/environment';
 
 export default class AddReimbursementComponent extends Component {
@@ -84,8 +85,25 @@ export default class AddReimbursementComponent extends Component {
     this.total = btcAmount.toFixed(8);
   }
 
+  // TODO use ember-concurrency here
+  // https://github.com/67P/kredits-web/pull/209#discussion_r1064234421
   @action
-  updateContributor(event) {
+  async addExpensesFromFile (evt) {
+    const content = await readFileContent(evt.target.files[0]);
+    const expenses = JSON.parse(content);
+
+    if (expenses instanceof Array) {
+      for (const item of expenses) {
+        this.addExpenseItem(item);
+      }
+    } else {
+      console.warn("Expenses in file must be a list of items:");
+      console.debug(content);
+    }
+  }
+
+  @action
+  updateContributor (event) {
     this.recipientId = event.target.value;
   }
 
diff --git a/app/components/add-reimbursement/template.hbs b/app/components/add-reimbursement/template.hbs
index 6c1c06a..43235b3 100644
--- a/app/components/add-reimbursement/template.hbs
+++ b/app/components/add-reimbursement/template.hbs
@@ -87,3 +87,9 @@
     <AddExpenseItem @addExpenseItem={{fn this.addExpenseItem}} />
   {{/if}}
 </form>
+<form id="add-expenses-from-file">
+  <h3>Add expense items from file</h3>
+  <input type="file" multiple="false"
+         onchange={{fn this.addExpensesFromFile}}
+         accept="application/json" />
+</form>
diff --git a/app/components/budget-balances/component.js b/app/components/budget-balances/component.js
index 7ae86bd..39b6aa0 100644
--- a/app/components/budget-balances/component.js
+++ b/app/components/budget-balances/component.js
@@ -3,7 +3,7 @@ import { inject as service } from '@ember/service';
 import { alias } from '@ember/object/computed';
 
 export default class BudgetBalancesComponent extends Component {
-  @service communityFunds
+  @service communityFunds;
   @alias('communityFunds.balances') balances;
 
   get loading () {
diff --git a/app/components/reimbursement-list/component.js b/app/components/reimbursement-list/component.js
index 75a5770..79c260d 100644
--- a/app/components/reimbursement-list/component.js
+++ b/app/components/reimbursement-list/component.js
@@ -1,7 +1,23 @@
 import Component from '@glimmer/component';
 import { sort } from '@ember/object/computed';
+import { action } from '@ember/object';
+import { inject as service } from '@ember/service';
+import config from 'kredits-web/config/environment';
 
 export default class ReimbursementListComponent extends Component {
+  @service kredits;
+
   itemSorting = Object.freeze(['pendingStatus:asc', 'id:desc']);
   @sort('args.items', 'itemSorting') itemsSorted;
+
+  get ipfsGatewayUrl () {
+    return config.ipfs.gatewayUrl;
+  }
+
+  @action
+  veto (id) {
+    this.kredits.vetoReimbursement(id).then(transaction => {
+      console.debug('[controllers:budget] Veto submitted to chain: '+transaction.hash);
+    });
+  }
 }
diff --git a/app/components/reimbursement-list/template.hbs b/app/components/reimbursement-list/template.hbs
index a04f230..6e85150 100644
--- a/app/components/reimbursement-list/template.hbs
+++ b/app/components/reimbursement-list/template.hbs
@@ -3,8 +3,12 @@
     <li data-reimbursement-id={{reimbursement.id}}
         class="{{item-status reimbursement}}">
       <p class="meta">
-        <span class="recipient"><UserAvatar @contributor={{reimbursement.contributor}} /></span>
-        <span class="title">Expenses covered by {{reimbursement.contributor.name}}</span>
+        <span class="title">
+          Expenses covered by {{reimbursement.contributor.name}}
+        </span>
+        <span class="recipient">
+          <UserAvatar @contributor={{reimbursement.contributor}} />
+        </span>
       </p>
       <p class="token-amount">
         <span class="amount">
@@ -26,6 +30,17 @@
           </li>
         {{/each}}
       </ul>
+      {{#if this.kredits.currentUserIsCore}}
+        <p>
+          <a href="{{this.ipfsGatewayUrl}}/{{reimbursement.ipfsHash}}"
+             class="button small" target="_blank" rel="noopener noreferrer">
+            Inspect IPFS data
+          </a>
+          <button {{on "click" (fn this.veto reimbursement.id)}}
+                  disabled={{reimbursement.vetoed}}
+                  class="button small danger">veto</button>
+        </p>
+      {{/if}}
     </li>
   {{/each}}
 </ul>
\ No newline at end of file
diff --git a/app/services/kredits.js b/app/services/kredits.js
index f47954d..dc62d47 100644
--- a/app/services/kredits.js
+++ b/app/services/kredits.js
@@ -617,6 +617,18 @@ export default Service.extend({
     yield this.fetchMissingObjects.perform('Reimbursement');
   }).group('syncTaskGroup'),
 
+  vetoReimbursement (id) {
+    console.debug('[kredits] veto against reimbursement', id);
+    const reimbursement = this.reimbursements.findBy('id', id);
+
+    return this.kredits.Reimbursement.functions.veto(id, { gasLimit: 300000 })
+      .then(data => {
+        console.debug('[kredits] veto response', data);
+        reimbursement.set('pendingTx', data);
+        return data;
+      });
+  },
+
   //
   // Contract events
   //
@@ -676,7 +688,7 @@ export default Service.extend({
   },
 
   async handleContributionVetoed (contributionId) {
-    console.debug('[kredits] ContributionVetoed event received for ', contributionId);
+    console.debug('[kredits] ContributionVetoed event received for #', contributionId);
     const c = this.contributions.findBy('id', contributionId);
 
     if (c) {
@@ -687,9 +699,6 @@ export default Service.extend({
     }
   },
 
-  //
-  // TODO test when reimbursement txs are successful
-  //
   async handleReimbursementAdded (id, addedByAccount, amount) {
     console.debug('[kredits] ReimbursementAdded event received', { id, addedByAccount, amount });
 
@@ -703,20 +712,19 @@ export default Service.extend({
     }
 
     const data = await this.kredits.Reimbursement.getById(id);
-    this.loadReimbursementFromData(data);
+    const r = this.loadReimbursementFromData(data);
+    this.browserCache.reimbursements.setItem(r.id.toString(), r.serialize());
   },
 
-  //
-  // TODO test when reimbursement txs are successful and veto is implemented
-  //
-  handleReimbursementVetoed (id) {
-    console.debug('[kredits] ReimbursementVetoed received for ', id);
-    const reimbursement = this.reimbursements.findBy('id', id);
-    console.debug('[kredits] reimbursement', this.reimbursement);
+  async handleReimbursementVetoed (id) {
+    console.debug(`[kredits] ReimbursementVetoed received for #${id}`);
+    const r = this.reimbursements.findBy('id', id);
+    console.debug('[kredits] reimbursement', r);
 
-    if (reimbursement) {
-      reimbursement.set('vetoed', true);
-      reimbursement.set('pendingTx', null);
+    if (r) {
+      r.set('vetoed', true);
+      r.set('pendingTx', null);
+      this.browserCache.reimbursements.setItem(r.id.toString(), r.serialize());
     }
   },
 
diff --git a/app/styles/components/_reimbursement-list.scss b/app/styles/components/_reimbursement-list.scss
index 3c22894..dfbb5d8 100644
--- a/app/styles/components/_reimbursement-list.scss
+++ b/app/styles/components/_reimbursement-list.scss
@@ -7,6 +7,11 @@ ul.reimbursement-list {
     grid-row-gap: 0.5rem;
     padding-top: 1.6rem;
 
+    &.vetoed {
+      text-decoration: line-through;
+      opacity: 0.6;
+    }
+
     .token-amount {
       text-align: right;
 
diff --git a/app/utils/read-file-content.js b/app/utils/read-file-content.js
new file mode 100644
index 0000000..0413399
--- /dev/null
+++ b/app/utils/read-file-content.js
@@ -0,0 +1,8 @@
+export default function (file) {
+  const reader = new FileReader();
+  return new Promise((resolve, reject) => {
+    reader.onload = event => resolve(event.target.result)
+    reader.onerror = error => reject(error)
+    reader.readAsText(file)
+  })
+}