Consumers mainly in the UK have received unsolicited jewelry parcels carrying fake identification certificates, the Gemmological Association of Great Britain (Gem-A) has warned.

People have reported receiving “diamond solitaire” rings in “platinum” in a grey or pink box, Gem-A said Thursday. These came in pink gift bags with the word “Princess” in gold letters. They had no identifying postage labels, receipts, confirmation letters or information documents, the London-based education provider explained.

Each parcel included a fake laminated “identification certificate” purporting to be from the “Fellowship of Gemological Association of Great Britain” — with the American spelling of “gemological” and not the British style that the organization uses.

The fraudulent document also contains the logos of the International Gemological Institute (IGI), the International Laboratory Accreditation Cooperation (ILAC), Platinum Guild International, and the Gemological Institute of America (GIA), Gem-A said.

Main image: One of the fake certificates. (Gem-A)