diff --git a/lib/model/meteor-model.js b/lib/model/meteor-model.js
index 6b8b334..3cdadd9 100644
--- a/lib/model/meteor-model.js
+++ b/lib/model/meteor-model.js
@@ -101,7 +101,7 @@ export const saveAuthorizationCode = bind(function saveAuthCode (code, client, u
     redirectUri,
     scope: code.scope,
     client: {
-      id: client.client_id
+      id: client.clientId
     },
     user: {
       id: user.id
@@ -139,5 +139,14 @@ export const saveRefreshToken = bind(function (token, clientId, expires, user) {
  * @private used by OAuthMeteorModel.prototype.getRefreshToken
  */
 export const getRefreshToken = bind(function (refreshToken) {
-  return collections.RefreshTokens.findOne({ refreshToken })
+  return collections.AccessTokens.findOne({ refreshToken })
+})
+
+export const revokeToken = bind(function (token) {
+  const docCount = collections.AccessTokens.find({ refreshToken: token.refreshToken }).count()
+  if (docCount === 0) {
+    return true
+  }
+
+  return collections.AccessTokens.remove({ refreshToken: token.refreshToken }) === docCount
 })
diff --git a/lib/model/model.js b/lib/model/model.js
index 55b99e1..8231e22 100644
--- a/lib/model/model.js
+++ b/lib/model/model.js
@@ -10,7 +10,8 @@ import {
   saveAuthorizationCode,
   saveRefreshToken,
   saveToken,
-  getAccessToken
+  getAccessToken,
+  revokeToken
 } from './meteor-model'
 
 /**
@@ -174,6 +175,14 @@ class OAuthMeteorModel {
     this.log('grantTypeAllowed (clientId:', clientId, ', grantType:', grantType + ')')
     return ['authorization_code', 'refresh_token'].includes(grantType)
   }
+
+  /**
+   * revokeToken(refreshToken) is required and should return true
+   */
+  async revokeToken (refreshToken) {
+    this.log(`revokeToken (refreshToken: ${refreshToken})`)
+    return revokeToken(refreshToken)
+  }
 }
 
 export { OAuthMeteorModel }
diff --git a/lib/oauth.js b/lib/oauth.js
index 79e84b5..e5e7930 100644
--- a/lib/oauth.js
+++ b/lib/oauth.js
@@ -17,6 +17,7 @@ import { validateParams } from './validation/validateParams'
 import { requiredAuthorizeGetParams } from './validation/requiredAuthorizeGetParams'
 import { requiredAuthorizePostParams } from './validation/requiredAuthorizePostParams'
 import { requiredAccessTokenPostParams } from './validation/requiredAccessTokenPostParams'
+import { requiredRefreshTokenPostParams } from './validation/requiredRefreshTokenPostParams'
 import { UserValidation } from './validation/UserValidation'
 import { OptionsSchema } from './validation/OptionsSchema'
 
@@ -407,7 +408,7 @@ const initRoutes = (self, { accessTokenUrl = '/oauth/token', authorizeUrl = '/oa
   // - validate authorization code
   // - issue accessToken and refreshToken
   route('post', accessTokenUrl, async function (req, res /*, next */) {
-    if (!validateParams(req.body, requiredAccessTokenPostParams, self.debug)) {
+    if (!validateParams(req.body, req.body?.refresh_token ? requiredRefreshTokenPostParams : requiredAccessTokenPostParams, self.debug)) {
       return errorHandler(res, {
         status: 400,
         error: 'invalid_request',
diff --git a/lib/utils/isModelInterface.js b/lib/utils/isModelInterface.js
index 4db2a16..e963e2f 100644
--- a/lib/utils/isModelInterface.js
+++ b/lib/utils/isModelInterface.js
@@ -10,7 +10,8 @@ const modelNames = [
   'saveAuthorizationCode',
   'saveRefreshToken',
   'saveToken',
-  'getAccessToken'
+  'getAccessToken',
+  'revokeToken'
 ]
 
 /**
@@ -28,6 +29,7 @@ const modelNames = [
  * - 'saveRefreshToken',
  * - 'saveToken',
  * - 'getAccessToken'
+ * - 'revokeToken'
  * @param model {Object} the model implementation
  * @return {boolean} true if valid, otherwise false
  */
diff --git a/lib/validation/requiredRefreshTokenPostParams.js b/lib/validation/requiredRefreshTokenPostParams.js
new file mode 100644
index 0000000..59588fc
--- /dev/null
+++ b/lib/validation/requiredRefreshTokenPostParams.js
@@ -0,0 +1,11 @@
+import { Match } from 'meteor/check'
+import { nonEmptyString } from './nonEmptyString'
+
+const isNonEmptyString = Match.Where(nonEmptyString)
+
+export const requiredRefreshTokenPostParams = {
+  grant_type: isNonEmptyString,
+  refresh_token: isNonEmptyString,
+  client_id: Match.Maybe(String),
+  client_secret: Match.Maybe(String)
+}