Checkout Merchant

PostFinance Checkout is the most practical all-in-one payment solution for Swiss online shops – a contractual partner, a plug-in and five payment options for your customers: PostFinance Card, PostFinance e-finance, TWINT, Visa and Mastercard.

Target group for the following documentation

The following documentation is intended for the software developers of our e-commerce and POS merchants. The page provides an overview of the most important API forms of integration as well as interface descriptions. The relevant sections refer to the detailed documentation of the PostFinance Checkout product. This page should therefore be understood as a navigation aid in order to obtain a quick overview of the checkout integration forms and interfaces.

Scope of PostFinance products

The interface documentation relates to the following PostFinance products.

Checkout All-in-One (integrated acquiring with digital onboarding)

  • Checkout All-in-One for e-commerce merchants (sale in online shops)
  • Checkout all-in-one for POS payment merchants (in-store sales)
  • Checkout all-in-one for omnichannel merchants (sales in the online shop and in-store sales)

Checkout Flex (flexible choice of acquiring acceptance partners)

  • Checkout Flex for e-commerce merchants (sale in online shops)
  • Checkout Flex for POS payment merchants (in-store sales)
  • Checkout Flex for omnichannel merchants (sales in the online shop and in-store sales)

All you need to know

Contact

We are available from 8 a.m. to 5 p.m., Monday to Friday, to answer your questions and enquiries.

Are you already familiar with our frequently asked questions? You may find an answer to your question in our FAQ on Checkout.

0848 382 423 (max. CHF 0.08/min. in Switzerland)

Online via e-mail.