The Metropolitan Police has said it will "take no further action" over claims Andrew Mountbatten-Windsor asked his police protection officer for information on accuser Virginia Giuffre.
The allegations, first reported in the Mail on Sunday in October, said the then-prince gave the officer Ms Giuffre's date of birth and social security number, just before the paper published a photo of the pair meeting in February 2011.
On Saturday, the Met said a further assessment "has not revealed any additional evidence of criminal acts or misconduct".
Mr Mountbatten-Windsor has not commented on the reports, but has consistently denied all allegations against him.
A spokesperson for the police force said: "The Met remains committed to thoroughly assessing any new information that could assist in this matter.
