diff --git a/docs/endpoints/post-token-generate.md b/docs/endpoints/post-token-generate.md
index d2240de62..023d0d2d8 100644
--- a/docs/endpoints/post-token-generate.md
+++ b/docs/endpoints/post-token-generate.md
@@ -15,11 +15,7 @@ Requests a UID2 token generated from a user's <Link href="../ref-info/glossary-u
 
 Used by: This endpoint is used mainly by publishers.
 
-:::important
-The `optout_check` parameter, required with a value of `1`, checks whether the user has opted out.
-:::
-
-<!-- uid2_euid_diff re legal basis for admonition above -->
+<!-- uid2_euid_diff: admonition re legal basis (in EUID not in UID2)-->
 
 Rather than calling this endpoint directly, you could use one of the SDKs to manage it for you. For a summary of options, see [SDKs: Summary](../sdks/summary-sdks.md).
 
@@ -46,7 +42,7 @@ Here's what you need to know about sending requests to this endpoint:
 ### Unencrypted JSON Body Parameters
 
 :::important
-You must include only **one** of the following four conditional parameters, plus the required `optout_check` parameter with a value of `1`, as key-value pairs in the JSON body of the request when encrypting it.
+You must include only **one** of the following four conditional parameters as key-value pairs in the JSON body of the request when encrypting it.
 :::
 
 | Body Parameter | Data Type | Attribute | Description | 
@@ -55,7 +51,6 @@ You must include only **one** of the following four conditional parameters, plus
 | `email_hash` | string | Conditionally Required | The [Base64-encoded SHA-256](../getting-started/gs-normalization-encoding.md#email-address-hash-encoding) hash of a [normalized](../getting-started/gs-normalization-encoding.md#email-address-normalization) email address. |
 | `phone` | string | Conditionally Required | The [normalized](../getting-started/gs-normalization-encoding.md#phone-number-normalization) phone number for which to generate tokens. |
 | `phone_hash` | string | Conditionally Required | The [Base64-encoded SHA-256](../getting-started/gs-normalization-encoding.md#phone-number-hash-encoding) hash of a [normalized](../getting-started/gs-normalization-encoding.md#phone-number-normalization) phone number. |
-| `optout_check` | number | Required | Checks whether the user has opted out. Include this parameter with a value of `1`.|
 
 ### Request Examples
 
@@ -67,33 +62,29 @@ The following are unencrypted JSON request body examples for each parameter, one
 
 ```json
 {
-    "email": "username@example.com",
-    "optout_check": 1
+    "email": "username@example.com"
 }
 ```
 ```json
 {
-    "email_hash": "tMmiiTI7IaAcPpQPFQ65uMVCWH8av9jw4cwf/F5HVRQ=",
-    "optout_check": 1
+    "email_hash": "tMmiiTI7IaAcPpQPFQ65uMVCWH8av9jw4cwf/F5HVRQ="
 }
 ```
 ```json
 {
-    "phone": "+12345678901",
-    "optout_check": 1
+    "phone": "+12345678901"
 }
 ```
 ```json
 {
-    "phone_hash": "wdN1alhrbw1Bmz49GzKGdPvGxLhCNn7n3teAOQ/FSK4=",
-    "optout_check": 1
+    "phone_hash": "wdN1alhrbw1Bmz49GzKGdPvGxLhCNn7n3teAOQ/FSK4="
 }
 ```
 
 Here's an encrypted token generation request example for an email hash:
 
 ```sh
-echo '{"email_hash": "tMmiiTI7IaAcPpQPFQ65uMVCWH8av9jw4cwf/F5HVRQ=","optout_check":1}' | python3 uid2_request.py https://prod.uidapi.com/v2/token/generate [Your-Client-API-Key] [Your-Client-Secret] 
+echo '{"email_hash": "tMmiiTI7IaAcPpQPFQ65uMVCWH8av9jw4cwf/F5HVRQ="}' | python3 uid2_request.py https://prod.uidapi.com/v2/token/generate [Your-Client-API-Key] [Your-Client-Secret]
 ```
 For details, and code examples in different programming languages, see [Encrypting Requests and Decrypting Responses](../getting-started/gs-encryption-decryption.md).
 
diff --git a/docs/getting-started/gs-encryption-decryption.md b/docs/getting-started/gs-encryption-decryption.md
index 0657dcf83..3d833dd80 100644
--- a/docs/getting-started/gs-encryption-decryption.md
+++ b/docs/getting-started/gs-encryption-decryption.md
@@ -114,7 +114,7 @@ This section includes encryption and decryption code examples in different progr
 For the [POST&nbsp;/token/refresh](../endpoints/post-token-refresh.md) endpoint, the code takes the values for `refresh_token` and `refresh_response_key` that were obtained from a prior call to [POST&nbsp;/token/generate](../endpoints/post-token-generate.md) or [POST&nbsp;/token/refresh](../endpoints/post-token-refresh.md).
 
 :::note
-For Windows, if you're using Windows Command Prompt instead of PowerShell, you must also remove the single quotes surrounding the JSON. For example, use `echo {"email": "test@example.com", "optout_check": 1}`.
+For Windows, if you're using Windows Command Prompt instead of PowerShell, you must also remove the single quotes surrounding the JSON. For example, use `echo {"email": "test@example.com"}`.
 :::
 
 ### Prerequisites and Notes
@@ -228,8 +228,8 @@ Usage:
    echo '<json>' | python3 uid2_request.py <url> <api_key> <client_secret>
 
 Example:
-   echo '{"email": "test@example.com", "optout_check": 1}' | python3 uid2_request.py https://prod.uidapi.com/v2/token/generate PRODGwJ0hP19QU4hmpB64Y3fV2dAed8t/mupw3sjN5jNRFzg= wJ0hP19QU4hmpB64Y3fV2dAed8t/mupw3sjN5jNRFzg=
-   
+   echo '{"email": "test@example.com"}' | python3 uid2_request.py https://prod.uidapi.com/v2/token/generate PRODGwJ0hP19QU4hmpB64Y3fV2dAed8t/mupw3sjN5jNRFzg= wJ0hP19QU4hmpB64Y3fV2dAed8t/mupw3sjN5jNRFzg=
+
 
 Refresh Token Usage:
    python3 uid2_request.py <url> --refresh-token <refresh_token> <refresh_response_key>
@@ -356,7 +356,7 @@ public class Uid2Request {
       +             "java -jar Uid2Request-jar-with-dependencies.jar <url> <api_key> <client_secret>" + "\n\n"
       
       +       "Example:" + "\n   "  
-      +             "echo '{\"email\": \"test@example.com\", \"optout_check\": 1}' | java -jar Uid2Request-jar-with-dependencies.jar https://prod.uidapi.com/v2/token/generate PRODGwJ0hP19QU4hmpB64Y3fV2dAed8t/mupw3sjN5jNRFzg= wJ0hP19QU4hmpB64Y3fV2dAed8t/mupw3sjN5jNRFzg=" + "\n\n\n"
+      +             "echo '{\"email\": \"test@example.com\"}' | java -jar Uid2Request-jar-with-dependencies.jar https://prod.uidapi.com/v2/token/generate PRODGwJ0hP19QU4hmpB64Y3fV2dAed8t/mupw3sjN5jNRFzg= wJ0hP19QU4hmpB64Y3fV2dAed8t/mupw3sjN5jNRFzg=" + "\n\n\n"
       
       +       "Refresh Token Usage:" + "\n   "
       +             "java -jar Uid2Request-jar-with-dependencies.jar <url> --refresh-token <refresh_token> <refresh_response_key>"  + "\n\n"
@@ -466,8 +466,8 @@ Usage:
    echo '<json>' | .\uid2_request <url> <api_key> <client_secret>
 
 Example:
-   echo '{"email": "test@example.com", "optout_check": 1}' | .\uid2_request https://prod.uidapi.com/v2/token/generate UID2-C-L-999-fCXrMM.fsR3mDqAXELtWWMS+xG1s7RdgRTMqdOH2qaAo= wJ0hP19QU4hmpB64Y3fV2dAed8t/mupw3sjN5jNRFzg=
-   
+   echo '{"email": "test@example.com"}' | .\uid2_request https://prod.uidapi.com/v2/token/generate UID2-C-L-999-fCXrMM.fsR3mDqAXELtWWMS+xG1s7RdgRTMqdOH2qaAo= wJ0hP19QU4hmpB64Y3fV2dAed8t/mupw3sjN5jNRFzg=
+
 
 Refresh Token Usage:
    .\uid2_request <url> --refresh-token <refresh_token> <refresh_response_key>
@@ -810,8 +810,8 @@ func printUsage() {
    echo '<json>' | go run uid2_request.go <url> <api_key> <client_secret>
 
 Example:
-   echo '{"email": "test@example.com", "optout_check": 1}' | go run uid2_request.go https://prod.uidapi.com/v2/token/generate UID2-C-L-999-fCXrMM.fsR3mDqAXELtWWMS+xG1s7RdgRTMqdOH2qaAo= wJ0hP19QU4hmpB64Y3fV2dAed8t/mupw3sjN5jNRFzg=
-   
+   echo '{"email": "test@example.com"}' | go run uid2_request.go https://prod.uidapi.com/v2/token/generate UID2-C-L-999-fCXrMM.fsR3mDqAXELtWWMS+xG1s7RdgRTMqdOH2qaAo= wJ0hP19QU4hmpB64Y3fV2dAed8t/mupw3sjN5jNRFzg=
+
 
 Refresh Token Usage:
    go run uid2_request.go <url> --refresh-token <refresh_token> <refresh_response_key>
diff --git a/docs/getting-started/gs-faqs.md b/docs/getting-started/gs-faqs.md
index 96092f99e..addc47e1d 100644
--- a/docs/getting-started/gs-faqs.md
+++ b/docs/getting-started/gs-faqs.md
@@ -92,7 +92,7 @@ No, publishers do not need to decrypt <Link href="../ref-info/glossary-uid#gl-ui
 #### How will I be notified of user opt-out?
 
 If the user has opted out, the API response notifies you in either of these cases:
-- When you generate the UID2 token by a call to the [POST&nbsp;/token/generate](../endpoints/post-token-generate.md) endpoint, either directly or via one of the UID2 SDKs, using the required `optout_check` parameter with a value of `1`.
+- When you generate the UID2 token by a call to the [POST&nbsp;/token/generate](../endpoints/post-token-generate.md) endpoint, either directly or via one of the UID2 SDKs.
 - When you refresh the UID2 token by a call to the [POST&nbsp;/token/refresh](../endpoints/post-token-refresh.md) endpoint, either directly or via one of the UID2 SDKs.
 
 #### Where should I make token generation calls&#8212;from the server side or the client side?
diff --git a/docs/getting-started/gs-opt-out.md b/docs/getting-started/gs-opt-out.md
index 5be66a84c..dce913fbb 100644
--- a/docs/getting-started/gs-opt-out.md
+++ b/docs/getting-started/gs-opt-out.md
@@ -48,7 +48,7 @@ The following steps provide a high-level outline of the opt-out workflow intende
 
    | Participant | Distribution Method |
    | :--- | :--- | 
-   | Publishers | A publisher calling [POST&nbsp;/token/generate](../endpoints/post-token-generate.md) with the required `optout_check` parameter set to `1`, or [POST&nbsp;/token/refresh](../endpoints/post-token-refresh.md), receives the opt-out response instead of the UID2 token. |
+   | Publishers | A publisher calling [POST&nbsp;/token/generate](../endpoints/post-token-generate.md), or [POST&nbsp;/token/refresh](../endpoints/post-token-refresh.md), receives the opt-out response instead of the UID2 token. |
    | DSPs | The UID2 Operator Service distributes information on all opted-out users to DSPs via a webhook provided for the purpose. For details, see [Honor User Opt-Outs](../guides/dsp-guide#honor-user-opt-outs).<br/>DSPs can also check the opt-out status of raw UID2s using the [POST&nbsp;/optout/status](../endpoints/post-optout-status.md) endpoint. |
    | Advertisers and data providers | The UID2 Operator Service distributes opt-out information to advertisers and data providers via the [POST&nbsp;/identity/map](../endpoints/post-identity-map.md) endpoint. Another option is to check the opt-out status of raw UID2s using the [POST&nbsp;/optout/status](../endpoints/post-optout-status.md) endpoint. |
    | Sharers | UID2 sharers can check the opt-out status of raw UID2s using the [POST&nbsp;/optout/status](../endpoints/post-optout-status.md) endpoint. |
diff --git a/docs/ref-info/updates-doc.md b/docs/ref-info/updates-doc.md
index 6ace08c5a..4691e371b 100644
--- a/docs/ref-info/updates-doc.md
+++ b/docs/ref-info/updates-doc.md
@@ -20,6 +20,28 @@ Check out the latest updates to our UID2 documentation resources.
 Use the Tags toolbar to view a subset of documentation updates.
 :::
 
+## Q1 2026
+
+The following documents were released in the first quarter of 2026.
+
+<CustomTagsContainer tags="Endpoints, SDKs, Opt-Out">
+
+### Removal of optout_check Parameter
+
+February 10, 2026
+
+The `optout_check` parameter has been removed from the [POST&nbsp;/token/generate](../endpoints/post-token-generate.md) endpoint. Opt-out checks are now handled automatically so publishers no longer need to include this parameter in their requests.
+
+Related SDK functions have also been deprecated and removed from documentation:
+- Java SDK: `doNotGenerateTokensForOptedOut()`
+- Python SDK: `do_not_generate_tokens_for_opted_out()`
+
+All code examples and integration guides have been updated to reflect these changes.
+
+<!-- UID2-6511 -->
+
+</CustomTagsContainer>
+
 ## Q4 2025
 
 The following documents were released in this quarter.
diff --git a/docs/sdks/sdk-ref-java.md b/docs/sdks/sdk-ref-java.md
index 5298f7210..349ef83c6 100644
--- a/docs/sdks/sdk-ref-java.md
+++ b/docs/sdks/sdk-ref-java.md
@@ -147,16 +147,10 @@ If you're using the SDK's HTTP implementation, follow these steps.
 
 2. Call a function that takes the user's email address or phone number as input and generates a `TokenGenerateResponse` object. The following example uses an email address:
    ```java
-   TokenGenerateResponse tokenGenerateResponse = publisherUid2Client.generateTokenResponse(TokenGenerateInput.fromEmail("user@example.com").doNotGenerateTokensForOptedOut());
+   TokenGenerateResponse tokenGenerateResponse = publisherUid2Client.generateTokenResponse(TokenGenerateInput.fromEmail("user@example.com"));
    ```
 
-   :::important
-   <!-- - Be sure to call the POST&nbsp;/token/generate endpoint only when you have a legal basis to convert the user’s <Link href="../ref-info/glossary-uid#gl-dii">directly identifying information (DII)</Link> to UID2 tokens for targeted advertising.
-
-   - --> Always apply `doNotGenerateTokensForOptedOut()`. This applies a parameter similar to setting `optout_check=1` in the call to the POST&nbsp;/token/generate endpoint (see [Unencrypted JSON Body Parameters](../endpoints/post-token-generate.md#unencrypted-json-body-parameters)).
-   :::
-
-<!-- uid2_euid_diff re legal basis for admonition above (first bullet not in UID2) -->
+<!-- uid2_euid_diff: admonition re legal basis (in EUID not in UID2)-->
 
 #### Basic Usage, Client-Server Integration
 
@@ -224,7 +218,7 @@ If you're using server-side integration (see [Publisher Integration Guide, Serve
 2. Call a function that takes the user's email address or phone number as input and creates a secure request data envelope. See [Encrypting requests](../getting-started/gs-encryption-decryption.md#encrypting-requests). The following example uses an email address:
 
     ```java
-    EnvelopeV2 envelope = publisherUid2Helper.createEnvelopeForTokenGenerateRequest(TokenGenerateInput.fromEmail("user@example.com").doNotGenerateTokensForOptedOut());
+    EnvelopeV2 envelope = publisherUid2Helper.createEnvelopeForTokenGenerateRequest(TokenGenerateInput.fromEmail("user@example.com"));
     ```
 3. Using an HTTP client library of your choice, post this envelope to the [POST&nbsp;token/generate](../endpoints/post-token-generate.md) endpoint, including headers and body:
    1. Headers: Depending on your HTTP library, this might look something like the following:  
@@ -232,13 +226,8 @@ If you're using server-side integration (see [Publisher Integration Guide, Serve
       `.putHeader("Authorization", "Bearer " + UID2_API_KEY)`  
       `.putHeader("X-UID2-Client-Version", PublisherUid2Helper.getVersionHttpHeader())`
    2. Body: `envelope.getEnvelope()`
-   :::important
-   <!-- - Be sure to call the POST&nbsp;/token/generate endpoint only when you have a legal basis to convert the user’s <Link href="../ref-info/glossary-uid#gl-dii">directly identifying information (DII)</Link> to UID2 tokens for targeted advertising.
-
-   - --> Always apply `doNotGenerateTokensForOptedOut()`. This applies a parameter similar to setting `optout_check=1` in the call to the POST&nbsp;/token/generate endpoint (see [Unencrypted JSON Body Parameters](../endpoints/post-token-generate.md#unencrypted-json-body-parameters)).
-   :::
 
-   <!-- uid2_euid_diff re legal basis for admonition above (first bullet not in UID2) -->
+<!-- uid2_euid_diff: admonition re legal basis (in EUID not in UID2)-->
 
 4. If the HTTP response status code is _not_ 200, see [Response Status Codes](../endpoints/post-token-generate.md#response-status-codes) to determine next steps. Otherwise, convert the UID2 identity response content into a `TokenGenerateResponse` object:
 
diff --git a/docs/sdks/sdk-ref-python.md b/docs/sdks/sdk-ref-python.md
index 49a297fb7..421f0c335 100644
--- a/docs/sdks/sdk-ref-python.md
+++ b/docs/sdks/sdk-ref-python.md
@@ -158,16 +158,10 @@ Decryption response codes, and their meanings, are shown in the following table.
 2. Call a function that takes the user's email address or phone number as input and generates a `TokenGenerateResponse` object. The following example uses an email address:
 
    ```py
-   token_generate_response = client.generate_token(TokenGenerateInput.from_email("user@example.com").do_not_generate_tokens_for_opted_out())
+   token_generate_response = client.generate_token(TokenGenerateInput.from_email("user@example.com"))
    ```
 
-    <!-- :::important
-    Be sure to call this function only when you have a legal basis to convert the user’s <Link href="../ref-info/glossary-uid#gl-dii">directly identifying information (DII)</Link> to UID2 tokens for targeted advertising.
-    :::
-
-<!-- uid2_euid_diff re legal basis for admonition above (not in UID2) -->
-
- `do_not_generate_tokens_for_opted_out()` applies `optout_check=1` in the [POST&nbsp;/token/generate](../endpoints/post-token-generate.md) call. Without this, `optout_check` is omitted to maintain backwards compatibility.
+<!-- uid2_euid_diff: admonition re legal basis (in EUID not in UID2)-->
 
 ### Client-Server Integration