---
updatedAt: 2026-04-21T08:57:19.000Z
agentTools:
  projectIndex: https://docs.mesh.complyadvantage.com/llms.txt
---

# Assign a case to a user

This endpoint updates the assignee for a single case (to a new value or to null).


You need the "Update cases" permission to use this endpoint.

# OpenAPI definition

```json
{
  "components": {
    "schemas": {
      "case-management_AssignedCaseResponse": {
        "description": "Assignee case information.",
        "properties": {
          "assignee": {
            "description": "The user identifier to whom the case is assigned, or null if unassigned.",
            "format": "uuid",
            "nullable": true,
            "type": "string"
          },
          "updated_at": {
            "description": "The date and time at which this case was last updated.",
            "format": "date-time",
            "type": "string"
          },
          "updated_by": {
            "description": "The user identifier that last updated this case.",
            "format": "uuid",
            "nullable": true,
            "type": "string"
          }
        },
        "required": [
          "updated_at"
        ],
        "type": "object"
      },
      "case-management_CaseAssignment": {
        "description": "Case assignment update request.",
        "properties": {
          "assignee": {
            "description": "The user identifier to whom the case should be assigned, or null to un-assign.",
            "format": "uuid",
            "nullable": true,
            "type": "string"
          }
        },
        "type": "object"
      }
    },
    "securitySchemes": {
      "BearerAuth": {
        "description": "HTTP Bearer Token Authentication",
        "scheme": "bearer",
        "type": "http"
      }
    }
  },
  "info": {
    "title": "Mesh API",
    "version": "v2.0"
  },
  "openapi": "3.0.3",
  "paths": {
    "/v2/cases/{case_identifier}/assign": {
      "post": {
        "description": "This endpoint updates the assignee for a single case (to a new value or to null).\n\n\nYou need the \"Update cases\" permission to use this endpoint.",
        "operationId": "casesService/v2/cases/case_identifier/assign.post",
        "parameters": [
          {
            "description": "The unique identifier of the case.",
            "example": "01899c37-576b-7677-b41a-9c9fdbd3bde1",
            "in": "path",
            "name": "case_identifier",
            "required": true,
            "schema": {
              "format": "uuid",
              "type": "string"
            }
          }
        ],
        "requestBody": {
          "content": {
            "application/json": {
              "schema": {
                "$ref": "#/components/schemas/case-management_CaseAssignment"
              }
            }
          },
          "required": true
        },
        "responses": {
          "200": {
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/case-management_AssignedCaseResponse"
                }
              }
            },
            "description": "OK"
          }
        },
        "summary": "Assign a case to a user",
        "tags": [
          "Cases"
        ]
      }
    }
  },
  "security": [
    {
      "BearerAuth": []
    }
  ],
  "servers": [
    {
      "description": "ComplyAdvantage Mesh API",
      "url": "https://api.mesh.complyadvantage.com"
    }
  ],
  "tags": [
    {
      "name": "Cases"
    }
  ]
}
```