diff --git a/src/main.ts b/src/main.ts
index f31901c0..8a7311c6 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -7,11 +7,13 @@ import NetlifyAPI from 'netlify'
 import * as path from 'path'
 import {defaultInputs, Inputs} from './inputs'
 
-const commentIdentifierString =
-  '<!-- NETLIFY DEPLOY COMMENT GENERATED BY ACTIONS_NETLIFY -->'
+function getCommentIdentifierString(siteId: string): string {
+  return `<!-- NETLIFY DEPLOY COMMENT GENERATED BY ACTIONS_NETLIFY - APP ID: ${siteId} -->`
+}
 
 async function findIssueComment(
-  githubClient: InstanceType<typeof GitHub>
+  githubClient: InstanceType<typeof GitHub>,
+  siteId: string
 ): Promise<number | undefined> {
   const listCommentsRes = await githubClient.issues.listComments({
     owner: context.issue.owner,
@@ -21,9 +23,11 @@ async function findIssueComment(
   })
 
   const comments = listCommentsRes.data
+  const commentIdString = getCommentIdentifierString(siteId)
+
   for (const comment of comments) {
     // If comment contains the comment identifier
-    if (comment.body.includes(commentIdentifierString)) {
+    if (comment.body.includes(commentIdString)) {
       return comment.id
     }
   }
@@ -120,7 +124,7 @@ export async function run(inputs: Inputs): Promise<void> {
     if (githubToken === '') {
       return
     }
-    const markdownComment = `${commentIdentifierString}\n${message}`
+    const markdownComment = `${getCommentIdentifierString(siteId)}\n${message}`
 
     // Create GitHub client
     const githubClient = getOctokit(githubToken)
@@ -150,7 +154,7 @@ export async function run(inputs: Inputs): Promise<void> {
         let commentId: number | undefined = undefined
         if (overwritesPullRequestComment) {
           // Find issue comment
-          commentId = await findIssueComment(githubClient)
+          commentId = await findIssueComment(githubClient, siteId)
         }
 
         // NOTE: if not overwrite, commentId is always undefined