Since the Financial Institutions are the source of the financial data that is going to delivered, there are a few cases that the information extracted by Flinks is not going to be sufficient for an EFT (Electronic Funds Transfer).

The EFT Eligible Ratio is a feature that shows the probability of Flinks to successfully gather all the details from the account for InstitutionNumber, TransitNumber and AccountNumber, based on our past requests with similar accounts. Some accounts, for example, are well known to Flinks to never have the full information available, therefore the ratio is always going to be zero. The same value also is given to accounts that we know are not eligible for EFT, even though we might deliver the complete information. 

You're able to see the ratio of every account in the response of a GetAccountsSummary call: