The activists announced plans to demonstrate at Worcester Cathedral on Thursday, where the Queen is set to attend the traditional Royal Maundy service on behalf of the King.
Following the Princess’s announcement of her cancer treatment in a video statement, Republic expressed well wishes for her quick recovery.
However, spokesperson Graham Smith clarified that their protests target the institution of the monarchy and not the individuals within the royal family.
Smith emphasized that Republic's campaign focuses on principles, politics, and institutional reform, criticizing the royals as public officials funded by taxpayers.
The organization's stance remains steadfast, with ongoing protests as long as the monarchy exists.
Smith stated, “As Camilla visits Worcester on Thursday, it serves as a reminder of the monarchy's detachment from values like equality, democracy, and the rule of law that most of us uphold.
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The King, known for his good-natured response to anti-monarchy demonstrations, made light of being egged during a protest in York in November 2022.
He humorously inquired about an "egg hunt" at a subsequent event, joking about the type of eggs thrown.
A student, Patrick Thelwell, faced legal consequences for his disruptive conduct during the protest and was sentenced to community service.
While Republic disapproves of such actions, the group advocates for peaceful protests with placards.
The upcoming Maundy service, a significant royal occasion, will see the Queen stepping in for the absent King, 75, a rare occurrence in royal protocol.
Both the King and Queen are expected to attend the Easter Matins service at St George’s Chapel in Windsor Castle on Sunday.