Before buying the IDL card from any company you have to know:

1. IDL is NON-Government document.
2. IDL can't substitute a state-issued driver's license and a photo ID card.
3. IDL can't verify your identity.
4. IDL doesn't give the permission to drive legally in the USA and any other country without state-issued driver's license, a state-issued identification card, valid immigration documents, or a passport. ( Note: IDL is not recognized in all U.S. States )
5. IDL can't be used in the country where you received your state-issued driver's license.
6. If you are USA resident, an IDL is of no use within the USA
7. All rental car companies have their own corporation rules. If you plan to rent a car in some country, you have to call the rental company and observe the company's rules and regulations before you buy the IDL.