View the bottom of this page for a complete list of prohibited products.
In order to obtain a merchant account through CDG, you must have some items for the bank to see. Here's a response from a real application:
Dear Merchant, I know you are still working on your website but the bank needs to see more of your website other than just the place holder page. Here is what the bank will want to see: bank will want to see
* your home page,
* product page with prices and an order button,
* return/refund policy,
* shipping policy,
* privacy policy.
* terms of service
The bank knows the order button will not go to an order page that can process as transaction since you are in the middle of applying for your merchant account. Please email a temp
URL. For example: yourdomain.com/cdg This way, the bank can see what you are working on and what kind of business you have.
If you don't have a merchant account already, we recommend you apply for one.
Login to your Quantum Gateway account.
Go to your “Processing Settings” page:

Find your “RestrictKey” section. It should look like this:

Hit the “Generate” button, then update.
Login to FoxyCart and go to your “payment” link under the “STORE” .
Select Quantum as the gateway. Enter your Quantum username as the login id (or “payment gateway id”), and your RestrictKey as the restrictkey (or “payment gateway key”).
Save.
Make sure your “Processing Mode” is set to LIVE, unless you don't want it to be.

Find the text “Enable Test Cards:” (under the “Processing” section in your Quantum Gateway Account) and set it to “N”. Click the “Update” button on that section.
Test.
According to CDG (and most other merchant account providers) the following will almost always be disallowed:
airlines
airplane charters
all sexual oriented/pornographic merchants:
companion/escort services
adult telephone conversations
adult book stores
dating services
online adult membership/matchmaker services
adult paraphernalia/toys
automotive broker
bankruptcy attorneys
calling cards
casino/gambling
check cashing services
coins/collectable currency
collection agencies
coupons/rewards-points program
credit repair
credit counseling
debt collection
discount health - medical care programs
debt consolidation
drug paraphernalia
exporting services (non US based)
finance broker/financial consulting services
financial planning/strategy/advising
get rich quick-books, programs, etc.
hype products/services
international merchants (non US based)
International shipping/cargo import/export
investment firms
investment strategy
investment books
lawyer referral services
life coaching
lotteries
magazine subscriptions
membership organizations (over 12 months)
merchants on the terminated merchant file (TMF list)
modeling agencies
multi-level marketing
music/movie/software downloads-uploads (ie. Copywrited music/movies or software ie. Microsoft office)
non US citizens
off-shore corp. establishment services
in-bound telemarketing/ outbound telemarketing services
replica handbags/ watches/ wallets/ sunglasses etc.
sports forecasting/odds making
talent agencies
telephone company
ticket brokers (unlicensed - non registered ie. Stub Hub type merchants)
third-party processing/factoring merchants
time-shares/time-shares advertising
tour operators
travel agencies
travel clubs
vacation planners
vitamin sales / diet pills / prescription pills / health supplements / pharmacy (mo/to-internet)
warranty
The above accounts do have many exceptions, subject to case-by-case underwriting.