• Home
  • Latest
  • Fortune 500
  • Finance
  • Tech
  • Leadership
  • Lifestyle
  • Rankings
  • Multimedia
FinanceScams

What the heck is ‘brushing’? The scam behind the China mystery seeds

Jeff John Roberts
By
Jeff John Roberts
Jeff John Roberts
Editor, Finance and Crypto
Down Arrow Button Icon
Jeff John Roberts
By
Jeff John Roberts
Jeff John Roberts
Editor, Finance and Crypto
Down Arrow Button Icon
July 30, 2020, 11:50 AM ET

Our mission to help you navigate the new normal is fueled by subscribers. To enjoy unlimited access to our journalism, subscribe today.

Thousands of Americans are receiving seeds in the mail wrapped in packages with Chinese characters. The mystery seeds, which the recipients did not order, have triggered warnings from agricultural authorities who say “do not plant them.”

The USDA and FBI are still investigating the packages—which reportedly include seeds for grass, cucumbers, and melon—but the growing consensus among law enforcement is that they are part of a “brushing” scam.

The term “brushing” was unfamiliar to most Americans until news about the seed mystery. Here’s what it means and how the scam works.

What is brushing?

Brushing is a shady way to boost the popularity of an online merchant by sending out unsolicited packages containing items of little value. The merchant—or more commonly a “brusher” middleman who they pay—writes positive reviews using the names of the recipients.

The goal is to appear higher in the search rankings of online platforms like Amazon. The algorithms of those platforms favor merchants with lots of sales and positive reviews from verified purchasers. Since the name on the review belongs to someone who did receive the product, it’s considered a verified purchase. Brushing can make it appear that hundreds or thousands of people have received and praised the merchant’s product.

When did brushing start?

One of the first uses of “brushing” in English-language media came via a 2015 Wall Street Journal report. The report is titled “They call it brushing” and describes how brushing had become a problem in China where unscrupulous merchants used the technique to game Alibaba, the country’s giant ecommerce platform. And in 2016, the Financial Times reported “China’s ecommerce sites try to sweep away brushing.”

The brushing phenomenon appears to have come to the U.S. not longer after that. A 2018 article by an organization called Scam Busters warned that Chinese brushers had begun large scale campaigns that targeted U.S. consumers.

Is brushing legal?

Probably not. It is certainly a violation of the terms of service of websites like Amazon, and several reports say the tactic violates laws against false advertising as well.

Who are the brushers behind the mystery seeds?

That remains unclear. The FBI and USDA have yet to suggest who is behind the recent seed campaign. Likewise, it is unclear if the brushers behind the campaign are selling seeds or gardening supplies—or if the seeds just represent an inexpensive item to put in the mail as part of the scam.

More must-read finance coverage from Fortune:

  • VC icon Alan Patricof and SoulCycle vet Abby Levy launch fund to invest in aging
  • When will the pandemic end? Not before 2022, ex-U.S. surgeon general warns
  • Women are more worried about layoffs than their male coworkers
  • PPP part 3? Everything you need to know about the proposed expansion of the small business loan program
  • Bank of America CEO Brian Moynihan on how business can measure stakeholder capitalism
About the Author
Jeff John Roberts
By Jeff John RobertsEditor, Finance and Crypto
LinkedIn iconTwitter icon

Jeff John Roberts is the Finance and Crypto editor at Fortune, overseeing coverage of the blockchain and how technology is changing finance.

See full bioRight Arrow Button Icon

Latest in Finance

Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025

Most Popular

Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Fortune Secondary Logo
Rankings
  • 100 Best Companies
  • Fortune 500
  • Global 500
  • Fortune 500 Europe
  • Most Powerful Women
  • Future 50
  • World’s Most Admired Companies
  • See All Rankings
Sections
  • Finance
  • Fortune Crypto
  • Features
  • Leadership
  • Health
  • Commentary
  • Success
  • Retail
  • Mpw
  • Tech
  • Lifestyle
  • CEO Initiative
  • Asia
  • Politics
  • Conferences
  • Europe
  • Newsletters
  • Personal Finance
  • Environment
  • Magazine
  • Education
Customer Support
  • Frequently Asked Questions
  • Customer Service Portal
  • Privacy Policy
  • Terms Of Use
  • Single Issues For Purchase
  • International Print
Commercial Services
  • Advertising
  • Fortune Brand Studio
  • Fortune Analytics
  • Fortune Conferences
  • Business Development
  • Group Subscriptions
About Us
  • About Us
  • Editorial Calendar
  • Press Center
  • Work At Fortune
  • Diversity And Inclusion
  • Terms And Conditions
  • Site Map
  • About Us
  • Editorial Calendar
  • Press Center
  • Work At Fortune
  • Diversity And Inclusion
  • Terms And Conditions
  • Site Map
  • Facebook icon
  • Twitter icon
  • LinkedIn icon
  • Instagram icon
  • Pinterest icon

Latest in Finance

Middle EastIran
Trump gives Iran 48 hours on Hormuz, threatens power plants
By Jennifer A. Dlouhy and BloombergMarch 21, 2026
7 hours ago
AIOpenAI
OpenAI plans to almost double its headcount this year, FT says
By Liza Tetley and BloombergMarch 21, 2026
9 hours ago
Arts & EntertainmentMusic
BTS begins comeback tour to reclaim status as one of the world’s biggest pop acts after completing Korea’s mandatory military service
By Juwon Park, Kim Tong-Hyung, Hyung-Jin Kim and The Associated PressMarch 21, 2026
9 hours ago
Middle EastIran
U.S. allows sale of stranded Iran oil to cap fuel-price rises
By Se Young Lee, Millie Munshi, Yongchang Chin and BloombergMarch 21, 2026
9 hours ago
Politicsarms, weapons, and defense
The U.S. has the world’s most advanced military, but the unforgiving economics of wars in Iran and Ukraine show quantity has a quality all its own 
By Jason MaMarch 21, 2026
10 hours ago
EnergyAirline industry
United Airlines plans for oil hitting $175 a barrel and staying above $100 next year as industry faces worst shock since COVID
By Jason MaMarch 21, 2026
15 hours ago

© 2026 Fortune Media IP Limited. All Rights Reserved. Use of this site constitutes acceptance of our Terms of Use and Privacy Policy | CA Notice at Collection and Privacy Notice | Do Not Sell/Share My Personal Information
FORTUNE is a trademark of Fortune Media IP Limited, registered in the U.S. and other countries. FORTUNE may receive compensation for some links to products and services on this website. Offers may be subject to change without notice.