Amazon was left with its tail between its legs after the advertising watchdog demanded its promotion for an electrical shock dog collar is amended.
The 'Sleeping Giant' collar gives barking dogs a shock to teach them not to bark, but these products are illegal to own in Wales after the introduction of The Animal Welfare (Electronic Collars) (Wales) Regulation in 2010.
A customer complained the advert could incite Welsh customers to break the law by not clearly displaying the fact that owning one in the country was illegal.
Amazon robustly denied the claim, saying as it is an international sales platform, it isn't viable to expect ads on Amazon to carry a list of up-to-date countries where products could and could not be used.
It maintained it was for the consumer to check whether or not it was legal to purchase a product.
But the Advertising Standards Agency said it considered customers in Wales may not have known that the product was illegal for them to use and demanded that the advert was changed to include a notice to that effect.
When The Huffington Post UK looked at the advert this morning, a sentence had been added to the product description stating: "Use of this item in Wales is prohibited".