You can pay to Bilder accounts in few ways:
Personal Web Panel
Log in to your Bilder account
On left upper corner click "+ New payment"
Insert short Bilder account number or full bank details.
Click "Continue"
Click "Confirm"
Mobile App
Open the app
Click on "Pay"
Click "New recipient"
Choose "With Bilder account"
Enter recipient full name and 6 character account number
Click "Add recipient"
Enter amount you wish to send and click "Continue"