The story of Anna Delvy is indeed real. It attracted significant media attention and many aspects have been verified. Though, like any story, it might have been presented with a certain degree of artistic license.
To some extent, it is real. But keep in mind that media coverage and storytelling might add some dramatization or simplify certain aspects. However, the core elements of the story are based on actual occurrences.
Anna Delvy is a con artist. She pretended to be a wealthy German heiress in New York. She scammed her way into luxury hotels, restaurants, and the social scene. She would run up huge bills and then not pay, using various lies and false pretenses.
One key event was her getting into luxury hotels by false pretenses. Another was running up large debts at restaurants. Also, her lies about her financial status being exposed was a major event.
In reality, the tale of Anna Delvy is true. Her exploits and actions were reported and documented. However, some details might have been dramatized or exaggerated for storytelling purposes.