diff --git a/src/services/ResourceService.js b/src/services/ResourceService.js
index 0602185..13769ca 100644
--- a/src/services/ResourceService.js
+++ b/src/services/ResourceService.js
@@ -211,6 +211,14 @@ async function init (currentUser, challengeId, resource, isCreated) {
   const challengeRes = await helper.getRequest(`${config.CHALLENGE_API_URL}/${challengeId}`)
   const challenge = challengeRes.body
 
+  // Prevent from creating more than 1 submitter resources on tasks
+  if (_.get(challenge, 'task.isTask', false) && isCreated && resource.roleId === config.SUBMITTER_RESOURCE_ROLE_ID) {
+    const existing = await getResources(currentUser, challengeId, config.SUBMITTER_RESOURCE_ROLE_ID, 1, 1)
+    if (existing.total > 0) {
+      throw new errors.ConflictError(`The Task is already assigned`)
+    }
+  }
+
   // logger.error(`Init Member for ${JSON.stringify(currentUser)}`)
   // get member information using v3 API
   const handle = resource.memberHandle