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Costco’s Kirkland Tequila at Center of Class Action Suit

The lawsuit claims Costco sold Kirkland tequilas adulterated with up to 95% non-agave alcohol, violating labeling laws and harming consumers and Mexican agave farmers.

  • On Friday, a federal suit filed in U.S. District Court in Seattle alleges Kirkland-brand tequilas sold by Costco, Issaquah, Washington, contain nonagave alcohol, representing 13 aggrieved tequila drinkers from Washington and eight other states.
  • Plaintiffs say the dispute stems from an Adulterated Tequila Enterprise seeking false certification to market Kirkland as 100% de Agave amid Mexican tequila regulation history relaxing standards to 51%, while Mexican agave farmers complain distilleries use nonagave alcohol.
  • Lab results cited in the complaint reveal Kirkland Reposado contained up to 95% nonagave alcohol, Kirkland Signature Blanco up to 40%, and Añejo , Extra Añejo , with Añejo Cristalino out of stock Friday.
  • Lawyers say Costco faces federal RICO and state consumer-protection claims, accusing Issaquah, Washington-based Costco of knowingly selling adulterated premium tequilas; Hagens Berman referred questions to its news release, and Costco had not responded by Friday at 5 p.m.
  • Related suits and industry disputes show Diageo and 818 Tequila face challenges over testing laboratories and methods, while 100% agave products command higher U.S. premium tequila market prices.
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Lawsuit alleges Costco's Kirkland Signature tequila is 'falsely labeled': What to know

The complaint alleges the tequilas are not made with the required amount of blue Weber agave tequila.

Costco is under legal scrutiny after being sued for allegedly promoting its Kirkland tequilas as produced with 100% Weber blue agave, while recent analyses suggest otherwise. The lawsuit, filed as a collective action in the South District of Florida, raises serious doubts about the accuracy of the information on the labels and its impact on consumers.

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libero.pe broke the news in on Monday, November 17, 2025.
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