Anything that happens during a run of DOTS Name Validation 3 that causes it to be unable to finish its normal processing is an error. If an error occurs, something like the following will be the result instead of the normal output.

StatusDetail

When NV3 is unable to validate the name normally, a StatusDetail object is returned instead of the NameResult object. This object is designed to return a dynamic message detailing what went wrong, however there are a few static messages that can be returned in specific situations. These are: 
"statusDetail": {
    "message": "Required input missing",
    "detail": "FullName OR FirstName OR LastName are required."
  }
and 
"statusDetail": {
    "message": "An unexpected error occurred. Please contact Service Objects.",
    "detail": ""
  }