Specifications for the Mobile Payments Services Data Model :-
Wikipedia says :-
"Mobile payment, also referred to as mobile money, mobile money transfer, and mobile wallet generally refer 
to payment services operated under financial regulation and performed from or via a mobile device. 
Instead of paying with cash, cheque, or credit cards, a consumer can use a mobile phone to pay for a 
wide range of services and digital or hard goods. 
Although the concept of using non-coin-based currency systems has a long history,[1] it is only recently 
that the technology to support such systems has become widely available."
Here are some very useful links from the Business Technology supplement in the UK's Daily Telegraph newspaper on May 7th. 2014.
Advice :-
Verifone Payment Talk
EE Tap Wallet - free on Android.
Apps :-
Google Wallet - free on Android.
EE Tap Wallet - free on Android.
Blogs :-
Payments Cards and Mobile
Talking Payments
Total Payments
Suppliers of Payment Services :-
ACI Universal Payments
Chase Payment Tech (a subsidiary of J P Morgan Chase)
goswiff
Helixion - on their Web site, they say "We are the NFC mobile payment experts".
mPay

B. Barry says the Things of Interest are :-
1. Accounts (Business Accounts)
2. Account_Content_Map
3. Account_Table_Map  
4. Campaigns
5. Contacts
6. Products
7. Others to be determined
C. The Business Rules are as follows :-
1. A Contact must be associated with a valid Business Account.
2. A Product must be associated with a valid Business Account.