diff --git a/.changeset/big-coins-sparkle.md b/.changeset/big-coins-sparkle.md
new file mode 100644
index 000000000..18d31694d
--- /dev/null
+++ b/.changeset/big-coins-sparkle.md
@@ -0,0 +1,5 @@
+---
+'@segment/analytics-consent-wrapper-onetrust': patch
+---
+
+Require category IDs for OneTrust mapping (e.g CAT0002, SEG0003), and do not accept category name any more. Reason: documentation is easier, and Segment currently has a 20 char limit on category IDs.
diff --git a/packages/consent/consent-wrapper-onetrust/README.md b/packages/consent/consent-wrapper-onetrust/README.md
index 6b4dec3ec..bac815f3c 100644
--- a/packages/consent/consent-wrapper-onetrust/README.md
+++ b/packages/consent/consent-wrapper-onetrust/README.md
@@ -3,8 +3,23 @@ This package is for the OneTrust integration for analytics consent
 
 # Quick Start
 
+## Configure OneTrust + Segment
+### Ensure that the OneTrust Banner SDK is loaded first
+```html
+<head>
+<!-- This should be included before the Segment snippet -->
+  <script src="https://cdn.cookielaw.org/scripttemplates/otSDKStub.js" type="text/javascript" charset="UTF-8"
+    data-domain-script="0000-0000-000-test"></script>
+```
+
+### Ensure that consent is enabled and that you have created your Integration -> Consent Category Mappings
+- Ensure that your integrations in the Segment UI have consent enabled, and that they map to your Consent Category IDs (also called Cookie Group IDs or Cookie Consent IDs).
+The IDs look like "CAT0001", "CAT0002"and are configurable in OneTrust
+![onetrust category ids](img/onetrust-cat-id.jpg)
 
-## Install dependency 
+-  Debugging: this library expects the [OneTrust Banner SDK](https://community.cookiepro.com/s/article/UUID-d8291f61-aa31-813a-ef16-3f6dec73d643?language=en_US) to be available in order interact with OneTrust. This library derives the group IDs that are active for the current user from the `window.OneTrustActiveGroups` object provided by the OneTrust SDK. [Read this for more information [community.cookiepro.com]](https://community.cookiepro.com/s/article/UUID-66bcaaf1-c7ca-5f32-6760-c75a1337c226?language=en_US).
+
+## Install dependency
 
 ```sh
 npm install @segment/analytics-consent-wrapper-onetrust
@@ -16,8 +31,8 @@ yarn add @segment/analytics-consent-wrapper-onetrust
 
 ## For `npm` library users
 
+- Use the following initialization code
 
-- Use the following initialization code 
 ```ts
 import { oneTrust } from '@segment/analytics-consent-wrapper-onetrust'
 import { AnalyticsBrowser } from '@segment/analytics-next'
@@ -30,7 +45,7 @@ analytics.load({ writeKey: '<MY_WRITE_KEY'> })
 ```
 
 ## For snippet users (window.analytics) who _also_ use a bundler like webpack
-### *NOTE:* a pre-bundled version that can be loaded through a `<script>` is on the roadmap, but _not_ supported at this point
+### _NOTE:_ a pre-bundled version that can be loaded through a `<script>` is on the roadmap, but _not_ supported at this point
 
 - Install the dependency (see directions)
 - Delete the `analytics.load()` line from the snippet
@@ -39,12 +54,11 @@ analytics.load({ writeKey: '<MY_WRITE_KEY'> })
 - analytics.load("<MY_WRITE_KEY>");
 ```
 
-- Use the following initialization code 
+- Use the following initialization code
 
 ```ts
 import { oneTrust } from '@segment/analytics-consent-wrapper-onetrust'
 
 oneTrust(window.analytics)
 window.analytics.load('<WRITE_KEY>')
-
 ```
diff --git a/packages/consent/consent-wrapper-onetrust/img/onetrust-cat-id.jpg b/packages/consent/consent-wrapper-onetrust/img/onetrust-cat-id.jpg
new file mode 100644
index 000000000..75619d621
Binary files /dev/null and b/packages/consent/consent-wrapper-onetrust/img/onetrust-cat-id.jpg differ
diff --git a/packages/consent/consent-wrapper-onetrust/src/domain/__tests__/wrapper.test.ts b/packages/consent/consent-wrapper-onetrust/src/domain/__tests__/wrapper.test.ts
index 7be4ed1c0..2184f5db7 100644
--- a/packages/consent/consent-wrapper-onetrust/src/domain/__tests__/wrapper.test.ts
+++ b/packages/consent/consent-wrapper-onetrust/src/domain/__tests__/wrapper.test.ts
@@ -9,15 +9,12 @@ const throwNotImplemented = (): never => {
 const grpFixture = {
   StrictlyNeccessary: {
     CustomGroupId: 'C0001',
-    GroupName: 'Strictly Neccessary Cookies',
   },
   Targeting: {
     CustomGroupId: 'C0004',
-    GroupName: 'Targeting Cookies',
   },
   Performance: {
     CustomGroupId: 'C0005',
-    GroupName: 'Performance Cookies',
   },
 }
 
@@ -112,11 +109,8 @@ describe('High level "integration" tests', () => {
       // contain both consented and denied category
       expect(categories).toEqual({
         C0001: true,
-        'Strictly Neccessary Cookies': true,
         C0004: false,
-        'Targeting Cookies': false,
         C0005: false,
-        'Performance Cookies': false,
       })
     })
   })
diff --git a/packages/consent/consent-wrapper-onetrust/src/domain/wrapper.ts b/packages/consent/consent-wrapper-onetrust/src/domain/wrapper.ts
index c0eeb23c4..bb4013b1d 100644
--- a/packages/consent/consent-wrapper-onetrust/src/domain/wrapper.ts
+++ b/packages/consent/consent-wrapper-onetrust/src/domain/wrapper.ts
@@ -46,8 +46,7 @@ export const oneTrust = (
         (acc, c) => {
           return {
             ...acc,
-            [c.groupName]: true,
-            [c.customGroupId]: true,
+            [c.groupId]: true,
           }
         },
         {}
@@ -57,8 +56,7 @@ export const oneTrust = (
         (acc, c) => {
           return {
             ...acc,
-            [c.groupName]: false,
-            [c.customGroupId]: false,
+            [c.groupId]: false,
           }
         },
         {}
diff --git a/packages/consent/consent-wrapper-onetrust/src/lib/__tests__/onetrust-api.test.ts b/packages/consent/consent-wrapper-onetrust/src/lib/__tests__/onetrust-api.test.ts
index 95a8888d6..0b93ea680 100644
--- a/packages/consent/consent-wrapper-onetrust/src/lib/__tests__/onetrust-api.test.ts
+++ b/packages/consent/consent-wrapper-onetrust/src/lib/__tests__/onetrust-api.test.ts
@@ -49,40 +49,31 @@ describe(getGroupData, () => {
         Groups: [
           {
             CustomGroupId: 'C0001',
-            GroupName: 'Strictly Neccessary Cookies',
           },
           {
             CustomGroupId: 'C0004',
-            GroupName: 'Targeting Cookies',
           },
           {
             CustomGroupId: 'SOME_OTHER_GROUP',
-            GroupName: 'Some other group',
           },
         ],
       }),
     }
     const data = getGroupData()
 
-    expect(data.userSetConsentGroups).toMatchInlineSnapshot(`
-      Array [
-        Object {
-          "customGroupId": "C0001",
-          "groupName": "Strictly Neccessary Cookies",
-        },
-        Object {
-          "customGroupId": "C0004",
-          "groupName": "Targeting Cookies",
-        },
-      ]
-    `)
-    expect(data.userDeniedConsentGroups).toMatchInlineSnapshot(`
-    Array [
-      Object {
-        "customGroupId": "SOME_OTHER_GROUP",
-        "groupName": "Some other group",
+    expect(data.userSetConsentGroups).toEqual([
+      {
+        groupId: 'C0001',
       },
-    ]
-  `)
+      {
+        groupId: 'C0004',
+      },
+    ])
+
+    expect(data.userDeniedConsentGroups).toEqual([
+      {
+        groupId: 'SOME_OTHER_GROUP',
+      },
+    ])
   })
 })
diff --git a/packages/consent/consent-wrapper-onetrust/src/lib/onetrust-api.ts b/packages/consent/consent-wrapper-onetrust/src/lib/onetrust-api.ts
index 740102f55..7e740dc77 100644
--- a/packages/consent/consent-wrapper-onetrust/src/lib/onetrust-api.ts
+++ b/packages/consent/consent-wrapper-onetrust/src/lib/onetrust-api.ts
@@ -7,7 +7,6 @@ const normalizeActiveGroupIds = (c: string): string[] =>
 
 type GroupInfoDto = {
   CustomGroupId: string
-  GroupName: string
 }
 
 /**
@@ -43,13 +42,11 @@ export const getConsentedGroupIds = (): string[] => {
 }
 
 export type GroupInfo = {
-  customGroupId: string
-  groupName: string
+  groupId: string
 }
 
 const normalizeGroupInfo = (groupInfo: GroupInfoDto): GroupInfo => ({
-  customGroupId: groupInfo.CustomGroupId.trim(),
-  groupName: groupInfo.GroupName.trim(), // should we allow groupName?
+  groupId: groupInfo.CustomGroupId.trim(),
 })
 
 /**
@@ -73,7 +70,7 @@ export const getGroupData = (): UserConsentGroupData => {
   // partition all groups into "consent" or "deny"
   const userConsentGroupData = getAllGroups().reduce<UserConsentGroupData>(
     (acc, group) => {
-      if (userSetConsentGroupIds.includes(group.customGroupId)) {
+      if (userSetConsentGroupIds.includes(group.groupId)) {
         acc.userSetConsentGroups.push(group)
       } else {
         acc.userDeniedConsentGroups.push(group)
