How to differentiate ajax result in HTML

I have an ajax call that returns a result in HTML. If the request is good, it returns a list of contacts in HTML; otherwise it should return validation errors. Both scenarios return HTML. The problem is this: If the requests to the server is successful, I have no way to tell if the result is validation errors or the list of contacts. I need to know so I can manipulate my HTML accordingly: $.ajax({ type: 'POST', [snip] success: function(response) { // here I need to tell if there was a validation error // or the request succeeded } For example, HTML for a good request might look like... @contact-name While a bad request will look like...
  • Please fix some error
I display the results in different locations, hence the need to distinguish between possible results.

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