Any more advice, or anyone know how the OP got on?

I tend to edge to the side of caution with companies like this. If you can't sell it on eBay or AutoTrader, then there is a serious problem, these companies are ridiculous and generally in my experience very unscrupulous

Hmm, I would suggest it is in Asda's interest to know and act upon the feedback customers provide?

Often these companies have "no liability" but I wonder how this actually stands up in practise.

Unfortunately sounds like a case of more care required when listing, I myself suffered from similar in the past, and eventually eBay / Paypal found in their favour.

Hi I just received a very similar letter from a solictor, and have drafted a letter as follows: Dear Sirs, I was shocked to receive your letter as I never have and never would knowingly sell counterfeit goods on eBay or elsewhere and without making further enquires cannot acknowledge that I have done so. Items I have sold recently were a one off purchase from a warehouse who I believe sold them as authentic goods, and I had no reason to believe otherwise. The sales were a one off attempt to raise funds to pay essential bills, due to financial difficulties recently encountered by a low income. In view of your letter I have not and will not offer any more of these items for sale as requested. While I am not aware of having done anything wrong, I am nonetheless anxious to be co-operative. Obviously I am not in a financial position to make any payments, and in any event I feel that I would need to seek further verification of your claim by contacting the XXX companies and seek legal advice before signing any documents. As I believed the items to be authentic, if they were proved to be otherwise I hope in the circumstances you will overlook this as a genuine error, and will advise me within 7 days that this is the case. Alternatively I request that you confirm that you are willing to allow me 28 days from receipt of this letter to allow me time to make further enquiries with the wholesalers, the XXX company and to consult a Solicitor. If I receive no response from you within 28 days I will assume that the matter is closed. For your information I have enclosed details of the source of the questioned items, and the volumes purchased and sold. Yours faithfully, Would this be considered the best approach?