Every Payday loan company must register their name with the Secretary of State before conducting their business. Based on the nature of business, they get the permission to operate under
- Sole proprietorship
- Partnership - general and limited
- Corporation - C-Corp; S-Corp; Professional,
- Not-for-Profit; Foreign Corporation
- Limited Liability Company - LLC
Legal structures, license and taxes are applicable on the business entity before executing business. It is the state bar council that will decide the norms of the business in a particular state.
If the business done by the payday loan company you mentioned is not allowed in your state, you must get more information about the applicable rules from the Secretary of State. You can research for the company that has a legitimate business in your state and make a deal with them.