diff --git a/mintlify/snippets/global-accounts/authentication.mdx b/mintlify/snippets/global-accounts/authentication.mdx
index 0f2bd3ee..f34199e1 100644
--- a/mintlify/snippets/global-accounts/authentication.mdx
+++ b/mintlify/snippets/global-accounts/authentication.mdx
@@ -392,7 +392,7 @@ curl -X POST "$GRID_BASE_URL/auth/credentials" \
   -H "Content-Type: application/json" \
   -d '{
     "type": "OAUTH",
-    "accountId": "EmbeddedWallet:019542f5-b3e7-1d02-0000-000000000002",
+    "accountId": "InternalAccount:019542f5-b3e7-1d02-0000-000000000002",
     "oidcToken": "eyJhbGciOiJSUzI1NiIsImtpZCI6ImFiYzEyMyIsInR5cCI6IkpXVCJ9..."
   }'
 ```
@@ -420,7 +420,7 @@ The lowest-friction credential type — works on any device with email access an
 
 ### Email OTP registration
 
-Creating the credential triggers an OTP email to the address you pass. The user reads the code off the email and submits it through your UI.
+Creating the credential triggers an OTP email to the customer email on file for the internal account. Do not include an `email` field in the request body; Grid resolves the address from the account's customer record.
 
 ```mermaid
 sequenceDiagram
@@ -429,8 +429,8 @@ sequenceDiagram
   participant G as Grid
   participant E as Email
 
-  C->>IB: POST /my-backend/otp/register { email }
-  IB->>G: POST /auth/credentials { type: EMAIL_OTP, email, accountId }
+  C->>IB: POST /my-backend/otp/register { accountId }
+  IB->>G: POST /auth/credentials { type: EMAIL_OTP, accountId }
   G->>E: deliver OTP email
   G-->>IB: 201 AuthMethod
   IB-->>C: { credentialId }
@@ -448,8 +448,7 @@ curl -X POST "$GRID_BASE_URL/auth/credentials" \
   -H "Content-Type: application/json" \
   -d '{
     "type": "EMAIL_OTP",
-    "accountId": "EmbeddedWallet:019542f5-b3e7-1d02-0000-000000000002",
-    "email": "jane@example.com"
+    "accountId": "InternalAccount:019542f5-b3e7-1d02-0000-000000000002"
   }'
 ```
 
@@ -458,7 +457,7 @@ curl -X POST "$GRID_BASE_URL/auth/credentials" \
 ```json
 {
   "id": "AuthMethod:019542f5-b3e7-1d02-0000-000000000004",
-  "accountId": "EmbeddedWallet:019542f5-b3e7-1d02-0000-000000000002",
+  "accountId": "InternalAccount:019542f5-b3e7-1d02-0000-000000000002",
   "type": "EMAIL_OTP",
   "nickname": "jane@example.com",
   "createdAt": "2026-04-19T12:00:00Z",
@@ -507,7 +506,7 @@ Every Global Account starts with a single credential — the one used in the <a
 ### List credentials
 
 ```bash
-curl -X GET "$GRID_BASE_URL/auth/credentials?accountId=EmbeddedWallet:019542f5-b3e7-1d02-0000-000000000002" \
+curl -X GET "$GRID_BASE_URL/auth/credentials?accountId=InternalAccount:019542f5-b3e7-1d02-0000-000000000002" \
   -u "$GRID_CLIENT_ID:$GRID_CLIENT_SECRET"
 ```
 
@@ -518,7 +517,7 @@ curl -X GET "$GRID_BASE_URL/auth/credentials?accountId=EmbeddedWallet:019542f5-b
   "data": [
     {
       "id": "AuthMethod:019542f5-b3e7-1d02-0000-000000000001",
-      "accountId": "EmbeddedWallet:019542f5-b3e7-1d02-0000-000000000002",
+      "accountId": "InternalAccount:019542f5-b3e7-1d02-0000-000000000002",
       "type": "PASSKEY",
       "nickname": "iPhone Face-ID",
       "createdAt": "2026-04-08T15:30:01Z",
@@ -526,7 +525,7 @@ curl -X GET "$GRID_BASE_URL/auth/credentials?accountId=EmbeddedWallet:019542f5-b
     },
     {
       "id": "AuthMethod:019542f5-b3e7-1d02-0000-000000000004",
-      "accountId": "EmbeddedWallet:019542f5-b3e7-1d02-0000-000000000002",
+      "accountId": "InternalAccount:019542f5-b3e7-1d02-0000-000000000002",
       "type": "EMAIL_OTP",
       "nickname": "jane@example.com",
       "createdAt": "2026-04-09T10:15:00Z",
@@ -567,7 +566,7 @@ Key rules:
 
 ### Add an additional credential
 
-Requires an active session on an *existing* credential on the same account. The first call looks identical to the one used to create the first credential; Grid detects the pre-existing credential and responds `202` instead of `201`.
+Requires an active session on an *existing* credential on the same account. The first call looks identical to the one used to create the first credential; Grid detects the pre-existing credential and responds `202` instead of `201`. For `EMAIL_OTP`, Grid uses the customer email on file for the internal account.
 
 <Steps>
   <Step title="First call — receive the challenge">
@@ -577,8 +576,7 @@ Requires an active session on an *existing* credential on the same account. The
       -H "Content-Type: application/json" \
       -d '{
         "type": "EMAIL_OTP",
-        "accountId": "EmbeddedWallet:019542f5-b3e7-1d02-0000-000000000002",
-        "email": "jane@example.com"
+        "accountId": "InternalAccount:019542f5-b3e7-1d02-0000-000000000002"
       }'
     ```
 
@@ -587,7 +585,7 @@ Requires an active session on an *existing* credential on the same account. The
     ```json
     {
       "type": "EMAIL_OTP",
-      "payloadToSign": "{\"requestId\":\"7c4a8d09-ca37-4e3e-9e0d-8c2b3e9a1f21\",\"type\":\"EMAIL_OTP\",\"accountId\":\"EmbeddedWallet:019542f5-b3e7-1d02-0000-000000000002\",\"expiresAt\":\"2026-04-08T15:35:00Z\"}",
+      "payloadToSign": "{\"requestId\":\"7c4a8d09-ca37-4e3e-9e0d-8c2b3e9a1f21\",\"type\":\"EMAIL_OTP\",\"accountId\":\"InternalAccount:019542f5-b3e7-1d02-0000-000000000002\",\"expiresAt\":\"2026-04-08T15:35:00Z\"}",
       "requestId": "7c4a8d09-ca37-4e3e-9e0d-8c2b3e9a1f21",
       "expiresAt": "2026-04-08T15:35:00Z"
     }
@@ -607,8 +605,7 @@ Requires an active session on an *existing* credential on the same account. The
       -H "Request-Id: 7c4a8d09-ca37-4e3e-9e0d-8c2b3e9a1f21" \
       -d '{
         "type": "EMAIL_OTP",
-        "accountId": "EmbeddedWallet:019542f5-b3e7-1d02-0000-000000000002",
-        "email": "jane@example.com"
+        "accountId": "InternalAccount:019542f5-b3e7-1d02-0000-000000000002"
       }'
     ```