A photographer might have placed Prince George under surveillance, monitoring his daily routines in order to photograph the 14-month-old.
This according to a statement seeking "reasonable assurances" from the photographer about his behavior after an incident last week.
PAUL HARRISON VIA SKY NEWS: "The individual was spotted in a central London park in the vicinity of Prince George, who was removed from the park immediately."
For the most part, the British press have refrained from publishing unauthorized photographs of the young prince. But as the BBC notes, the same is not true abroad.
NICHOLAS WITCHELL VIA BBC: "There is a considerable market for these photographs abroad – in the remainder of Europe, in the Middle East, certainly — which is why, of course, certain photographers, paparazzi photographers, feel that they're prepared to take the risks to obtain them."
The prince's parents have clashed with foreign publications before. Earlier this year, a German tabloid published photos of Duchess Catherine's butt. And in 2012 a French magazine published topless photos of the duchess.
Back when Prince William and his brother Prince Harry were children themselves, the royal family struck gentlemen's agreements with the tabloids, granting privacy to the boys in exchange for updates on their upbringing.
But before Prince George is subjected to the same media attention, his parents want him to live as ordinary a life as possible — which might resonate with celebrities on this side of the Atlantic.
In 2013, California attempted to protect the children of celebrities by making it a crime to "intentionally [harass] the child or ward of any other person because of that person's employment."
And as celebrities attempt to shield their children from the paparazzi, the so-called #NoKidsPolicy preventing unauthorized photos of celebrity children has been gaining steam.
According to the BBC, lawyers for the London photographer issued a seven-page letter contesting the claims made against him, adding, "He will continue to undertake his work with the concerns of the Prince's parents in mind."
Under a law passed in 1997 — the year Princess Diana was killed in a car accident — the royal couple has the option to take legal action that could include a jail sentence for the photographer.
This video includes images from Getty Images.