# Payment Features Finix has several features available that helps extend the functionality of your payments experience. ## Learn More Auth and Captures Learn how to authorize funds on a card before making a payment. Accept HSA or FSA Cards Learn about accepting HSA and FSA cards. Collecting Tips Learn how to include tips when processing payments. Buyer Charges Charge additional fees using Buyer Charges. Level 2 / Level 3 Processing Capture more information to reduce interchange rates. Sending Receipts Learn how to provide receipts for In-Person payments. Split Transactions Learn how to split a transaction across multiple sellers or recipients.