Credit Cards
For all markets and routes which an E-Ticket (Electronic Ticket) is available for, the following credit cards can be used for payment: Visa, MasterCard, American Express and Diners. Maestro and Solo are also available for the United Kingdom.
The MBNet system is also available for Portugal.
Debits are made immediately to the credit card indicated for payment. 
In the case of payment at ticket desks, the following payment methods are acceptable: Credit card (Visa, Mastercard, American Express, Diners Club and UATP), cash, debit card (ATM Card) or certified check.

Is it safe to use my card online?
This site has a sophisticated mechanism to detect and prevent possible fraud actions.
Through this innovative solution, it is possible to verify the authenticity of payments made online, allowing to safeguard in simultaneous the integrity and security of the customer details, protecting their own identity.
The security offered is performed using SSL (Secure Socket Layer) technology that is based on the encryption of the communication produced between your personal computer and our server to ensure the same cannot be intercepted.
As such, the airline has the right to refuse the carriage of passengers and luggage whenever a transaction is considered illicit or the purchase has been done through an agent who is not authorized by TAP Portugal.
Any and all activities considered as illegal, will be immediately reported to the competent authorities. 
 
3D Secure
3D Secure is a communications’ protocol that was developed to improve payment security on the Internet and make it possible to verify the credit card holder at the bank that issues their card.
When making a payment at an online shop a process is activated which checks whether the card used is valid or not. If it is, the security systems incorporated in the 3D Secure protocol verify the customer’s identity checking with the credit card company in real time. The company identifies the customer and informs the retailer’s system that the card used for payment is legitimate.
The aim is to benefit all those involved by reducing the probability of fraudulent use of credit cards and improving transaction performance.
This protocol is used by Visa with the flag Verified By Visa and Mastercard with the Secure Code sign.

ATM
Whenever you make an online booking and your flight departs from any location in Portugal, ATM payment methods are also available to you.
If you select ATM as a payment method this means you must pay for your trip at an ATM machine (or via Homebanking*). This method of payment is only available online for bookings made at least 5 (five) days prior to departure.

After concluding your booking you will be presented with a confirmation page with your booking details as well as the necessary information for you to make an ATM payment: TAP reference number, payment reference number and total amount payable. This data will also be sent to the e-mail address indicated during the booking process.
References must be completed at your ATM terminal by selecting the “Payment of Services” option or via Internet Homebanking* selecting the option “Payment of Purchases”.
You have until 11:59 PM of the day immediately following the day the booking was made to complete your payment. If payment is not completed within this period your booking will be automatically cancelled.
Payment via ATM machines is only available for cards issued in Portugal and for use at ATM terminals in Portugal.

* Please note that some banks do not offer the “Payment of Purchases” option via Internet Homebanking and in these cases or when experiencing any difficulty completing payment please contact TAP.