The Mail in Payment or Bank Transfer payment gateway modules display payment instructions on invoices. You can update this within the payment gateway configuration.
To change these instructions:
Navigate to Setup > Payments > Payment Gateways > Manage Existing Gateways
Change the Bank Transfer Instructions
To change these instructions:
1. Go to Configuration > System Settings > Payment Gateways.
2. Find the Bank Transfer Instructions section for the desired payment gateway.
3. Enter your new payment instructions.
4. Click Save Changes.