diff --git a/.template-lintrc.js b/.template-lintrc.js
index b45e96f..02bee12 100644
--- a/.template-lintrc.js
+++ b/.template-lintrc.js
@@ -1,5 +1,9 @@
 'use strict';
 
 module.exports = {
-  extends: 'recommended'
+  extends: 'recommended',
+
+  rules: {
+    'simple-unless': false
+  }
 };
diff --git a/app/components/contribution-list/component.js b/app/components/contribution-list/component.js
index c490f86..f85da1d 100644
--- a/app/components/contribution-list/component.js
+++ b/app/components/contribution-list/component.js
@@ -5,16 +5,16 @@ export default Component.extend({
   tagName: 'ul',
   classNames: ['contribution-list'],
 
-  // actions: {
-  //
-  //   veto (contributionId) {
-  //     if (this.contractInteractionEnabled) {
-  //       this.vetoContribution(contributionId);
-  //     } else {
-  //       window.alert('Only members can veto contributions. Please ask someone to set you up.');
-  //     }
-  //   }
-  //
-  // }
+  actions: {
+
+    veto (contributionId) {
+      if (this.contractInteractionEnabled) {
+        this.vetoContribution(contributionId);
+      } else {
+        window.alert('Only members can veto contributions. Please ask someone to set you up.');
+      }
+    }
+
+  }
 
 });
diff --git a/app/components/contribution-list/template.hbs b/app/components/contribution-list/template.hbs
index d53ad52..3a4aa90 100644
--- a/app/components/contribution-list/template.hbs
+++ b/app/components/contribution-list/template.hbs
@@ -1,5 +1,5 @@
 {{#each contributions as |contribution|}}
-  <li data-contribution-id={{contribution.id}} class={{if contribution.confirmed "confirmed" "unconfirmed"}}>
+  <li data-contribution-id={{contribution.id}} class={{contribution-status contribution}}>
     <p class="meta">
       <span class="recipient">{{user-avatar contributor=contribution.contributor}}</span>
       <span class="category {{contribution.kind}}">({{contribution.kind}})</span>
@@ -14,5 +14,12 @@
     <p class="kredits-amount">
       <span class="amount">{{contribution.amount}}</span><span class="symbol">₭S</span>
     </p>
+    {{#unless contribution.vetoed}}
+      {{#unless (is-confirmed-contribution contribution)}}
+        <p class="voting">
+          <button {{action "veto" contribution.id}} class="small danger">veto</button>
+        </p>
+      {{/unless}}
+    {{/unless}}
   </li>
 {{/each}}
\ No newline at end of file
diff --git a/app/controllers/index.js b/app/controllers/index.js
index 825a03d..d871450 100644
--- a/app/controllers/index.js
+++ b/app/controllers/index.js
@@ -33,10 +33,10 @@ export default Controller.extend({
 
   actions: {
 
-    vetoContribution (/* contributionId */) {
-      // this.kredits.vote(proposalId).then(transaction => {
-      //   window.confirm('Vote submitted to Ethereum blockhain: '+transaction.hash);
-      // });
+    vetoContribution (contributionId) {
+      this.kredits.veto(contributionId).then(transaction => {
+        window.confirm('Veto submitted to Ethereum blockhain: '+transaction.hash);
+      });
     },
 
     confirmProposal (proposalId) {
diff --git a/app/services/kredits.js b/app/services/kredits.js
index 12cd42c..f3358d1 100644
--- a/app/services/kredits.js
+++ b/app/services/kredits.js
@@ -52,9 +52,10 @@ export default Service.extend({
         });
       }
 
-      function instantiateWithAccount (web3Provider, context) {
+      async function instantiateWithAccount (web3Provider, context) {
         console.debug('[kredits] Using user-provided instance, e.g. from Mist browser or Metamask');
         ethProvider = new ethers.providers.Web3Provider(web3Provider);
+        // const network = await ethProvider.getNetwork();
         ethProvider.listAccounts().then(accounts => {
           context.set('currentUserAccounts', accounts);
           const ethSigner = accounts.length === 0 ? null : ethProvider.getSigner();
@@ -183,12 +184,22 @@ export default Service.extend({
     console.debug('[kredits] vote for', proposalId);
 
     return this.kredits.Proposal.functions.vote(proposalId)
-      .then((data) => {
+      .then(data => {
         console.debug('[kredits] vote response', data);
         return data;
       });
   },
 
+  veto(contributionId) {
+    console.debug('[kredits] veto against', contributionId);
+
+    return this.kredits.Contribution.functions.veto(contributionId)
+      .then(data => {
+        console.debug('[kredits] veto response', data);
+        return data;
+      });
+  },
+
   getCurrentUser: computed('kredits.provider', function() {
     if (isEmpty(this.currentUserAccounts)) {
       return RSVP.resolve();
diff --git a/app/styles/components/_contribution-list.scss b/app/styles/components/_contribution-list.scss
index 4cc0636..22452dc 100644
--- a/app/styles/components/_contribution-list.scss
+++ b/app/styles/components/_contribution-list.scss
@@ -20,14 +20,6 @@ ul.contribution-list {
     font-size: 1.2rem;
     border-bottom: 1px solid rgba(255,255,255,0.2);
 
-    &.unconfirmed {
-      grid-template-columns: auto 5rem 5rem;
-    }
-
-    &:first-of-type {
-      border-top: 1px solid rgba(255,255,255,0.2);
-    }
-
     p {
       align-self: center;
       margin: 0;
@@ -37,14 +29,6 @@ ul.contribution-list {
       &.kredits-amount, &.voting {
         text-align: right;
       }
-
-      // &.description {
-      //   grid-column-start: span 2;
-      // }
-
-      // &.voting {
-      //   grid-column-start: span 2;
-      // }
     }
 
     span {
@@ -96,6 +80,19 @@ ul.contribution-list {
       color: $primary-color;
       margin-right: 0.5rem;
     }
+
+    &:first-of-type {
+      border-top: 1px solid rgba(255,255,255,0.2);
+    }
+
+    &.unconfirmed {
+      grid-template-columns: auto 5rem 5rem;
+    }
+
+    &.vetoed {
+      text-decoration: line-through;
+      opacity: 0.6;
+    }
   }
 
 }