diff --git a/backend/src/config/index.ts b/backend/src/config/index.ts
index 698b17e67..1559e7571 100644
--- a/backend/src/config/index.ts
+++ b/backend/src/config/index.ts
@@ -126,6 +126,7 @@ const federation = {
       : process.env.FEDERATION_COMMUNITY_URL.endsWith('/')
       ? process.env.FEDERATION_COMMUNITY_URL
       : process.env.FEDERATION_COMMUNITY_URL + '/',
+  FEDERATION_VALIDATE_COMMUNITY_TIMER: process.env.FEDERATION_VALIDATE_COMMUNITY_TIMER || 60000,
 }
 
 const CONFIG = {
diff --git a/backend/src/federation/validateCommunities.ts b/backend/src/federation/validateCommunities.ts
new file mode 100644
index 000000000..8a9429973
--- /dev/null
+++ b/backend/src/federation/validateCommunities.ts
@@ -0,0 +1,29 @@
+import { Community as DbCommunity } from '@entity/Community'
+import { IsNull, LessThan, Raw } from '@dbTools/typeorm'
+import { requestGetPublicKey } from './client/1_0/FederationClient'
+import { FdCommunity } from './graphql/1_0/model/FdCommunity'
+
+export async function startValidateCommunities(timerInterval: number): Promise<void> {
+  while (true) {
+    const dbCommunities: DbCommunity[] = await DbCommunity.find({
+      where: [
+        { verifiedAt: IsNull() },
+        { verifiedAt: LessThan(Raw((lastAnnouncedAt) => `${lastAnnouncedAt}`)) },
+      ],
+    })
+    if (dbCommunities) {
+      dbCommunities.forEach(async function (dbCom) {
+        const fdCom = new FdCommunity(dbCom)
+        const pubKey = await requestGetPublicKey(fdCom)
+        if (pubKey && pubKey === dbCom.publicKey.toString('hex')) {
+          DbCommunity.update({ verifiedAt: new Date() }, { id: dbCom.id })
+        }
+      })
+    }
+    await sleep(timerInterval)
+  }
+}
+
+function sleep(ms: number) {
+  return new Promise((resolve) => setTimeout(resolve, ms))
+}
diff --git a/backend/src/index.ts b/backend/src/index.ts
index 329e63f87..a549172be 100644
--- a/backend/src/index.ts
+++ b/backend/src/index.ts
@@ -5,6 +5,7 @@ import { startDHT } from '@/federation/index'
 
 // config
 import CONFIG from './config'
+import { startValidateCommunities } from './federation/validateCommunities'
 
 async function main() {
   const { app } = await createServer()
@@ -17,6 +18,7 @@ async function main() {
       console.log(`GraphIQL available at http://localhost:${CONFIG.PORT}`)
     }
   })
+  startValidateCommunities(Number(CONFIG.FEDERATION_VALIDATE_COMMUNITY_TIMER))
 
   // start DHT hyperswarm when DHT_TOPIC is set in .env
   if (CONFIG.FEDERATION_DHT_TOPIC) {