If you have Login credentials to your Online Banking service, even if you don't have signing transactions credentials, you could register your account in the Unnax Portal. So yes, you can upload your account for readings and Pay Ins. 

You just must follow this simple steps: 
  • Login at Unnax Portal
  • Go to Config
  • Click on Bank Accounts
  • Click on "New bank account"
  • Fill your account data and select only "Pay-In" as a related products
  • Fill your Login Credentials information
  • Sign with Authy and you are done!

For more information please check the article How can I add login and signing credentials?