API Reference›Servicing Plane›Cases›Create a case relationship

Create a case relationship

POSThttps://sandbox.api.lendeasy.ai/v1/servicing/cases/{caseId}/relationshipsImplementedBearer token ·UPDATE_SERVICING_CASE

Creates or idempotently returns a reversible RELATED or POSSIBLE_DUPLICATE relationship without merging case history.

Request

curl -X POST https://sandbox.api.lendeasy.ai/v1/servicing/cases/$CASE_ID/relationships \
  -H "Authorization: Bearer $TOKEN" \
  -H "LendEasy-Tenant: $TENANT" \
  -H "Idempotency-Key: $IDEMPOTENCY_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "otherCaseId": 1002,
  "relationshipType": "POSSIBLE_DUPLICATE",
  "reason": "Both cases originate from the same customer email thread."
}'

await fetch(`https://sandbox.api.lendeasy.ai/v1/servicing/cases/${caseId}/relationships`, {
  method: "POST",
  headers: { Authorization: `Bearer ${token}`, "LendEasy-Tenant": tenant, "Idempotency-Key": idempotencyKey, "Content-Type": "application/json" },
  body: JSON.stringify({
  "otherCaseId": 1002,
  "relationshipType": "POSSIBLE_DUPLICATE",
  "reason": "Both cases originate from the same customer email thread."
}),
});

requests.post(
  f"https://sandbox.api.lendeasy.ai/v1/servicing/cases/{case_id}/relationships",
  headers={"Authorization": f"Bearer {token}", "LendEasy-Tenant": tenant, "Idempotency-Key": idempotency_key},
  json={
  "otherCaseId": 1002,
  "relationshipType": "POSSIBLE_DUPLICATE",
  "reason": "Both cases originate from the same customer email thread."
},
)

{
  "relationshipId": 501,
  "leftCaseId": 1001,
  "rightCaseId": 1002,
  "relationshipType": "POSSIBLE_DUPLICATE",
  "status": "ACTIVE",
  "resourceId": 501,
  "changes": {
    "relationshipStatus": "ACTIVE"
  }
}

{
  "developerMessage": "Request was understood but rejected; inspect errors for field-level causes.",
  "httpStatusCode": "400",
  "defaultUserMessage": "The request could not be applied.",
  "userMessageGlobalisationCode": "validation.msg.validation.errors.exist",
  "errors": []
}

{
  "developerMessage": "Request was understood but rejected; inspect errors for field-level causes.",
  "httpStatusCode": "401",
  "defaultUserMessage": "The request could not be applied.",
  "userMessageGlobalisationCode": "error.msg.not.authenticated",
  "errors": []
}

{
  "developerMessage": "Request was understood but rejected; inspect errors for field-level causes.",
  "httpStatusCode": "403",
  "defaultUserMessage": "The request could not be applied.",
  "userMessageGlobalisationCode": "error.msg.not.authorized",
  "errors": []
}

{
  "developerMessage": "Request was understood but rejected; inspect errors for field-level causes.",
  "httpStatusCode": "404",
  "defaultUserMessage": "The request could not be applied.",
  "userMessageGlobalisationCode": "error.msg.resource.not.found",
  "errors": []
}

{
  "developerMessage": "Request was understood but rejected; inspect errors for field-level causes.",
  "httpStatusCode": "409",
  "defaultUserMessage": "The request could not be applied.",
  "userMessageGlobalisationCode": "idempotency.request.in.flight",
  "errors": []
}

Path & query parameters

Field	Type	Description
LendEasy-Tenant required in header	string	Opaque active LendEasy tenant-registry identifier. Supply exactly one instance; no alternate tenant selector is accepted.
caseId required in path	integer	Positive numeric case identifier.
Idempotency-Key optional in header	string	Optional replay key for this logical mutation. Omission creates a fresh server-owned key for this attempt; blank, repeated, or longer-than-50-character values are rejected.

Body parameters

Field	Type	Description
otherCaseId required	integer
relationshipType required	string
reason required	string

Request

curl -X POST https://sandbox.api.lendeasy.ai/v1/servicing/cases/$CASE_ID/relationships \
  -H "Authorization: Bearer $TOKEN" \
  -H "LendEasy-Tenant: $TENANT" \
  -H "Idempotency-Key: $IDEMPOTENCY_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "otherCaseId": 1002,
  "relationshipType": "POSSIBLE_DUPLICATE",
  "reason": "Both cases originate from the same customer email thread."
}'

await fetch(`https://sandbox.api.lendeasy.ai/v1/servicing/cases/${caseId}/relationships`, {
  method: "POST",
  headers: { Authorization: `Bearer ${token}`, "LendEasy-Tenant": tenant, "Idempotency-Key": idempotencyKey, "Content-Type": "application/json" },
  body: JSON.stringify({
  "otherCaseId": 1002,
  "relationshipType": "POSSIBLE_DUPLICATE",
  "reason": "Both cases originate from the same customer email thread."
}),
});

requests.post(
  f"https://sandbox.api.lendeasy.ai/v1/servicing/cases/{case_id}/relationships",
  headers={"Authorization": f"Bearer {token}", "LendEasy-Tenant": tenant, "Idempotency-Key": idempotency_key},
  json={
  "otherCaseId": 1002,
  "relationshipType": "POSSIBLE_DUPLICATE",
  "reason": "Both cases originate from the same customer email thread."
},
)

{
  "relationshipId": 501,
  "leftCaseId": 1001,
  "rightCaseId": 1002,
  "relationshipType": "POSSIBLE_DUPLICATE",
  "status": "ACTIVE",
  "resourceId": 501,
  "changes": {
    "relationshipStatus": "ACTIVE"
  }
}

{
  "developerMessage": "Request was understood but rejected; inspect errors for field-level causes.",
  "httpStatusCode": "400",
  "defaultUserMessage": "The request could not be applied.",
  "userMessageGlobalisationCode": "validation.msg.validation.errors.exist",
  "errors": []
}

{
  "developerMessage": "Request was understood but rejected; inspect errors for field-level causes.",
  "httpStatusCode": "401",
  "defaultUserMessage": "The request could not be applied.",
  "userMessageGlobalisationCode": "error.msg.not.authenticated",
  "errors": []
}

{
  "developerMessage": "Request was understood but rejected; inspect errors for field-level causes.",
  "httpStatusCode": "403",
  "defaultUserMessage": "The request could not be applied.",
  "userMessageGlobalisationCode": "error.msg.not.authorized",
  "errors": []
}

{
  "developerMessage": "Request was understood but rejected; inspect errors for field-level causes.",
  "httpStatusCode": "404",
  "defaultUserMessage": "The request could not be applied.",
  "userMessageGlobalisationCode": "error.msg.resource.not.found",
  "errors": []
}

{
  "developerMessage": "Request was understood but rejected; inspect errors for field-level causes.",
  "httpStatusCode": "409",
  "defaultUserMessage": "The request could not be applied.",
  "userMessageGlobalisationCode": "idempotency.request.in.flight",
  "errors": []
}