diff --git a/.claude/skills/grid-api/SKILL.md b/.claude/skills/grid-api/SKILL.md
index 0aec9aca..7036f524 100644
--- a/.claude/skills/grid-api/SKILL.md
+++ b/.claude/skills/grid-api/SKILL.md
@@ -165,6 +165,8 @@ curl -s -u "$GRID_CLIENT_ID:$GRID_CLIENT_SECRET" \
 
 # Create customer (BUSINESS)
 # businessInfo REQUIRES legalName, taxId, and incorporatedOn (ISO date YYYY-MM-DD).
+# Always send businessType too: it's optional to the schema, but receivers can
+# require it, and without it POST /quotes fails with MISSING_MANDATORY_USER_INFO.
 curl -s -u "$GRID_CLIENT_ID:$GRID_CLIENT_SECRET" \
   -X POST -H "Content-Type: application/json" \
   -d '{
@@ -173,7 +175,8 @@ curl -s -u "$GRID_CLIENT_ID:$GRID_CLIENT_SECRET" \
     "businessInfo": {
       "legalName": "Acme Corporation, Inc.",
       "taxId": "47-1234567",
-      "incorporatedOn": "2018-03-14"
+      "incorporatedOn": "2018-03-14",
+      "businessType": "INFORMATION"
     }
   }' \
   "$GRID_BASE_URL/customers" | jq .
diff --git a/mintlify/global-p2p/onboarding/configuring-customers.mdx b/mintlify/global-p2p/onboarding/configuring-customers.mdx
index d0c79c89..c884b3d1 100644
--- a/mintlify/global-p2p/onboarding/configuring-customers.mdx
+++ b/mintlify/global-p2p/onboarding/configuring-customers.mdx
@@ -130,7 +130,8 @@ curl -sS -X POST "https://api.lightspark.com/grid/2025-10-13/customers" \
       "legalName": "Acme Corporation",
       "registrationNumber": "789012345",
       "taxId": "123-45-6789",
-      "incorporatedOn": "2018-03-14"
+      "incorporatedOn": "2018-03-14",
+      "businessType": "INFORMATION"
     },
     "address": {
       "line1": "456 Oak Avenue",
diff --git a/mintlify/ramps/onboarding/configuring-customers.mdx b/mintlify/ramps/onboarding/configuring-customers.mdx
index c96a7614..5d288ed7 100644
--- a/mintlify/ramps/onboarding/configuring-customers.mdx
+++ b/mintlify/ramps/onboarding/configuring-customers.mdx
@@ -74,7 +74,8 @@ curl -X POST 'https://api.lightspark.com/grid/2025-10-13/customers' \
     "businessInfo": {
       "legalName": "Acme Corporation",
       "taxId": "12-3456789",
-      "incorporatedOn": "2018-03-14"
+      "incorporatedOn": "2018-03-14",
+      "businessType": "INFORMATION"
     },
     "address": {...}
   }'
diff --git a/mintlify/snippets/creating-customers/customers.mdx b/mintlify/snippets/creating-customers/customers.mdx
index 722b513a..50d23a52 100644
--- a/mintlify/snippets/creating-customers/customers.mdx
+++ b/mintlify/snippets/creating-customers/customers.mdx
@@ -118,7 +118,8 @@ curl -sS -X POST "https://api.lightspark.com/grid/2025-10-13/customers" \
       "legalName": "Acme Corporation",
       "registrationNumber": "789012345",
       "taxId": "123-45-6789",
-      "incorporatedOn": "2018-03-14"
+      "incorporatedOn": "2018-03-14",
+      "businessType": "INFORMATION"
     },
     "address": {
       "line1": "456 Oak Avenue",
diff --git a/mintlify/snippets/kyc/kyc-regulated.mdx b/mintlify/snippets/kyc/kyc-regulated.mdx
index 11b3c02a..8b00235a 100644
--- a/mintlify/snippets/kyc/kyc-regulated.mdx
+++ b/mintlify/snippets/kyc/kyc-regulated.mdx
@@ -68,7 +68,8 @@ The examples below show a more comprehensive set of data. Not all fields are str
         "legalName": "Acme Corporation",
         "registrationNumber": "789012345",
         "taxId": "123-45-6789",
-        "incorporatedOn": "2018-03-14"
+        "incorporatedOn": "2018-03-14",
+        "businessType": "INFORMATION"
       },
       "address": {
         "line1": "456 Oak Avenue",
diff --git a/mintlify/snippets/kyc/kyc-unregulated.mdx b/mintlify/snippets/kyc/kyc-unregulated.mdx
index 5fecc17a..ebaf31eb 100644
--- a/mintlify/snippets/kyc/kyc-unregulated.mdx
+++ b/mintlify/snippets/kyc/kyc-unregulated.mdx
@@ -241,7 +241,8 @@ The shape of the flow depends on the customer type:
         "legalName": "Acme Corporation",
         "registrationNumber": "789012345",
         "taxId": "123-45-6789",
-        "incorporatedOn": "2018-03-14"
+        "incorporatedOn": "2018-03-14",
+        "businessType": "INFORMATION"
       },
       "address": {
         "line1": "456 Oak Avenue",