diff --git a/services/web/app/src/Features/TokenAccess/TokenAccessController.js b/services/web/app/src/Features/TokenAccess/TokenAccessController.js
index 4e0fe30b89..96bc6b69a8 100644
--- a/services/web/app/src/Features/TokenAccess/TokenAccessController.js
+++ b/services/web/app/src/Features/TokenAccess/TokenAccessController.js
@@ -233,7 +233,12 @@ async function grantTokenAccessReadAndWrite(req, res, next) {
   }
   const tokenType = TokenAccessHandler.TOKEN_TYPES.READ_AND_WRITE
 
-  TokenAccessHandler.checkTokenHashPrefix(token, tokenHashPrefix, tokenType)
+  TokenAccessHandler.checkTokenHashPrefix(
+    token,
+    tokenHashPrefix,
+    tokenType,
+    userId
+  )
 
   try {
     const [project, action] = await checkAndGetProjectOrResponseAction(
@@ -298,7 +303,12 @@ async function grantTokenAccessReadOnly(req, res, next) {
 
   const tokenType = TokenAccessHandler.TOKEN_TYPES.READ_ONLY
 
-  TokenAccessHandler.checkTokenHashPrefix(token, tokenHashPrefix, tokenType)
+  TokenAccessHandler.checkTokenHashPrefix(
+    token,
+    tokenHashPrefix,
+    tokenType,
+    userId
+  )
 
   const docPublishedInfo =
     await TokenAccessHandler.promises.getV1DocPublishedInfo(token)
diff --git a/services/web/app/src/Features/TokenAccess/TokenAccessHandler.js b/services/web/app/src/Features/TokenAccess/TokenAccessHandler.js
index 234d3e836a..2d6e4ad7d4 100644
--- a/services/web/app/src/Features/TokenAccess/TokenAccessHandler.js
+++ b/services/web/app/src/Features/TokenAccess/TokenAccessHandler.js
@@ -287,7 +287,7 @@ const TokenAccessHandler = {
     return hash.digest('hex').slice(0, 6)
   },
 
-  checkTokenHashPrefix(token, tokenHashPrefix, type) {
+  checkTokenHashPrefix(token, tokenHashPrefix, type, userId) {
     let hashPrefixStatus
 
     if (tokenHashPrefix) {
@@ -307,7 +307,7 @@ const TokenAccessHandler = {
 
     if (hashPrefixStatus === 'mismatch') {
       logger.info(
-        { tokenHashPrefix, hashPrefixStatus },
+        { tokenHashPrefix, hashPrefixStatus, userId },
         'mismatched token hash prefix'
       )
     }
diff --git a/services/web/test/unit/src/TokenAccess/TokenAccessControllerTests.js b/services/web/test/unit/src/TokenAccess/TokenAccessControllerTests.js
index 0beb92d794..2da7cb6f4b 100644
--- a/services/web/test/unit/src/TokenAccess/TokenAccessControllerTests.js
+++ b/services/web/test/unit/src/TokenAccess/TokenAccessControllerTests.js
@@ -109,7 +109,12 @@ describe('TokenAccessController', function () {
       it('checks token hash', function () {
         expect(
           this.TokenAccessHandler.checkTokenHashPrefix
-        ).to.have.been.calledWith(this.token, 'prefix', 'readAndWrite')
+        ).to.have.been.calledWith(
+          this.token,
+          'prefix',
+          'readAndWrite',
+          this.user._id
+        )
       })
     })
 
@@ -153,7 +158,12 @@ describe('TokenAccessController', function () {
       it('sends missing hash to metrics', function () {
         expect(
           this.TokenAccessHandler.checkTokenHashPrefix
-        ).to.have.been.calledWith(this.token, undefined, 'readAndWrite')
+        ).to.have.been.calledWith(
+          this.token,
+          undefined,
+          'readAndWrite',
+          this.user._id
+        )
       })
     })
   })
@@ -192,7 +202,12 @@ describe('TokenAccessController', function () {
       it('sends checks if hash prefix matches', function () {
         expect(
           this.TokenAccessHandler.checkTokenHashPrefix
-        ).to.have.been.calledWith(this.token, 'prefix', 'readOnly')
+        ).to.have.been.calledWith(
+          this.token,
+          'prefix',
+          'readOnly',
+          this.user._id
+        )
       })
     })
 
diff --git a/services/web/test/unit/src/TokenAccess/TokenAccessHandlerTests.js b/services/web/test/unit/src/TokenAccess/TokenAccessHandlerTests.js
index 3d8d681a18..824c000f11 100644
--- a/services/web/test/unit/src/TokenAccess/TokenAccessHandlerTests.js
+++ b/services/web/test/unit/src/TokenAccess/TokenAccessHandlerTests.js
@@ -650,6 +650,7 @@ describe('TokenAccessHandler', function () {
   })
 
   describe('checkTokenHashPrefix', function () {
+    const userId = 'abc123'
     it('sends "match" to metrics when prefix matches the prefix of the hash of the token', function () {
       const token = 'zxpxjrwdtsgd'
       const prefix = this.TokenAccessHandler.createTokenHashPrefix(token)
@@ -674,7 +675,8 @@ describe('TokenAccessHandler', function () {
       this.TokenAccessHandler.checkTokenHashPrefix(
         'anothertoken',
         `#${prefix}`,
-        'readOnly'
+        'readOnly',
+        userId
       )
 
       expect(this.Metrics.inc).to.have.been.calledWith(
@@ -685,7 +687,7 @@ describe('TokenAccessHandler', function () {
         }
       )
       expect(this.logger.info).to.have.been.calledWith(
-        { tokenHashPrefix: prefix, hashPrefixStatus: 'mismatch' },
+        { tokenHashPrefix: prefix, hashPrefixStatus: 'mismatch', userId },
         'mismatched token hash prefix'
       )
     })