The British model - who had originally planned to marry rocker Jamie Hince on July 2 - has left her 300 guests confused with a cryptic invitation that gave no reason why the nuptials have been changed, or whether her plans for a "festival" to celebrate her marriage will still go ahead.
A guest revealed: "I received a piece of white card with silver writing on it. It read, `KateMoss and Jamie Hince will be marrying pm Friday July 1. Save the date`.
"The date has shifted from Saturday the 2nd but there`s no information about where the wedding is, how many days, nights, etc. Kate`s doing her usual secret mission stuff but it`s not so funny when the wedding`s just four weeks away."
While the nuptials were believed to being held in a church near the 37-year-old beauty`s home in Oxfordshire, South East England, Kate`s sudden change of plans has thrown her guests into panic about what will actually be happening.
The source added to the Daily Star newspaper: "It`s very confusing. We have no idea how long to block out our time or where in the country we`ll be. We don`t know whether that`s the church or the party, whether we need to travel, or what`s going on.
"And Friday is a strange day to ask us to keep free when everyone believed it was a Saturday and a weekend away."