The Mystery Shopping Providers Association is a well-known organization for mystery shopping companies, but it is not the only one in existence. It may take a bit of time, but you can find other ones by looking online.
Type the search term “mystery shopping” + association (leave the quotation marks in place) into the search box of Google or any other search engine, and go through the results.
Here are a few examples of other associations connected with mystery shopping:
Visit the website to see a list of member companies. You will find contact information, as well as a description of the kinds of services they offer.
The Singapore Retailers Association offers mystery shopping services to its members. Each participating store receives visits over a three-month period.
This Association is open to owners of mystery shopping companies for networking purposes. All members must conduct themselves in a highly ethical manner. Members can also share information that will benefit other members of the Association, as long as it is not considered confidential.