I think you have to have worked within that industry for a certain amount of time, before you have been proven trustworthy enough of becoming one of their mystery shoppers.
References :

you have to register with a market research company - they send you to different places - you do not work forthe companies directly.
References :

Why would you want to be a mystery shopper?
References :

vacancies are advertised in the invisable column.
References :

i also have been a mystery shopper and i have worked for a honest one here is there website is second-to-none
References :
i have worked for this company and they r honest

Go to this site and click on the application link on the left side of the page. Good luck! I know someone who did and they loved it!
References :
http://www.mailfromhome.com/shop/default.asp?id=29167

don,t tell anyone your name
References :

Click on da link!
References :
http://www.google.com/search?hl=en&q=mystery+shops

http://www.freemoney.com/shopper/shopper.html
References :

Wear dark glasses, a long coat, and a big hat while you shop. Oh and only pay with cash, not credit, then it won't be a mystery who you are.
References :

write to whoever is the buyer… you should be able to ring through to reception and wangle the info
References :

I'm sorry I donot trust anyone who wants a "one time fee" payment b4 you get started. If someone needs you to work why would you pay to work for them. Not only that I would never give a perfectly good stranger my CC #. Good luck though b/c it does sound really fun.
References :

Mystery shoppers work for a seperate company, not the actual shop that they will be working in
References :

Hi,

Mystery shopping is actually quite a lucrative business and there are courses available. There's a business publisher called 'Avril Harper' who does a very good manual on the subject. I think her publishing company is called 'Canonbury Publishing'. You'll have to put it in the search engines and look for it. She's very well known, so you shouldn't have a problem. If you do have a problem..get back to me and I'm sure I can find it. Hope this is helpful. I think the reason you're not finding anything is because the stores don't usually employ mystery shoppers. They're usually from an outside source…individuals and companies.
References :

hi i have been a mystery shopper for 4 years with grassroots and many others

grassroots are the best comapny to work for they are free to you pay you once a month dorect into bank accounts and can you working in under 1 week. in your local area
the jobs you will do for them will include things such as

local banks
high street shops
mobile phones
http://www.grg.org

they are many more online that say they sign you up free and offer lots of work but dont im affraid all incure a cost and all conssist of empty offer for internet questionaires that pay you in prize draw tickets for 30 mins of question on a product.

so please be careful when joining them that you wont get charged any fees to join and that when you join they are able to
offer you work

please look as this site it has a few little mystery shopping sites in the links part
http://www.chewlips4u.blinkz.com
References :

dont no but thanx 4 the 2 points anyway
References :

If you would like to become a mystery shopper you can give me a call on 0207 908 6652 I am the HR Manager for a marketing research Company and we have a large dept in mystery shopping.

David Wynn
References :
I am a HR Manager

There's this magazine that have articles about it call the creative lofting, and it have numbers that will help you.
References :

All the information you need is at Work from Home Guide

http://www.workfromhomeguide.net

It's free and won't make you sign up for anything.
References :
Work from Home Guide

http://www.workfromhomeguide.net

They are not employed by the department stores. Outside agencies employ people to do these mystery shops with the norm being 3-4 different shops a day- not normally with the one shop.
Any that i have seen advertised offer positions on a casual part time basis. I cannot however think of any of their names- sorry.
Good luck with your search.
References :

good
References :

become a private detective.
References :

These jobs usually are advertised by agencies who do the recruitment. I know the Wilkinsons store uk advertise on their website. You could always write to the stores head office and im sure they will respond as you are showing an interest in their company. Browse the web also you should get plenty of useful links to mystery shopping recruitment agencies.
References :