Questions about Checkout Flex and Checkout All‑in‑one
Here you will find answers to questions about upgrades, transactions, plug-ins and more.
The product Checkout All-in-one is based on a collecting offer. This means that all payment methods (PostFinance, Visa, Mastercard and TWINT) are handled in one contract. For the product Checkout Flex, separate contracts must be concluded with the respective acceptance partners. Consequently, a termination of the Checkout All-in-one product is required and a new registration for the product Checkout Flex is required.
If you want to use the product Checkout Flex in the future, perform the following steps:
- Log in to the The link will open in a new window Checkout back office and
- Select the “+” symbol. On desktops: located at the bottom left of the screen. On mobile devices: you will find the “+” symbol in the menu.
- Select “Account”
- Enter the relevant name (e.g. company name)
- Select “Save account”
- Follow the set-up assistant and open the product Checkout Flex
To activate Checkout Flex, you will incur a one-off activation fee of CHF 249.00 excl. VAT. The monthly costs of using the product amount to CHF 19.90 excl. VAT.
Please note that your contract for the payment methods that come with Checkout All-in-One is not transferred to the new product. To use Checkout Flex, you will need to conclude additional contracts with the acceptance partners for all desired payment methods once you have registered.
Finally, you can cancel the product Checkout All-in-one (see question “How can I cancel Checkout All-in-one and Flex?”).
You can cancel your subscriptions at any time in the Checkout back office. When logged in, select Account > Subscription > Cancel subscription.
The checkout contract will be cancelled on your next billing run (max. 30 days).
Error 403 refers to a user having insufficient authorizations. As an admin user, you can grant other employees access to your account by creating users and assigning them roles and authorizations.
If you do not assign these users any roles or authorizations, you will not be able to access your account, and will instead see an error page “Access denied – Error code: 403”.
Be sure to always assign the appropriate reading rights to accounts and spaces. In other words, users must have read-only rights at least to accounts and spaces.
PostFinance (PostFinance Card, PostFinance e-finance)
E-mail: firstname.lastname@example.org, Tel.: 0848 382 423 (in Switzerland max. CHF 0.08/min.)
Worldline SIX (Visa, Mastercard, TWINT, China Union Pay, Diners)
E-Mail: email@example.com, Tel.: 0848 83 20 00
Point of sale (POS)
E-Mail: firstname.lastname@example.org, Tel.: 0848 83 20 00
Concardis (Visa, Mastercard, Diners)
E-mail: email@example.com, Tel.: 058 220 58 58
Swisscard (American Express)
E-mail: firstname.lastname@example.org, Tel.: 044 659 64 44
PowerPay (MF Group, payments on account)
E-mail: email@example.com, Tel.: 058 806 06 31
TWINT Ltd (TWINT)
E-mail: firstname.lastname@example.org, Tel.: 058 667 98 44
Contact details at The link will open in a new window paypal.com
Checkout Flex is continuously being improved and developed. New payment methods are added to the Checkout Flex product site all the time.
Your account ID represents the company. Your space ID represents the online shop/shop URL.
You can create an unlimited number of spaces in the account.
- Two spaces are included in the subscription price of CHF 19.90 excl. VAT
- For each additional space, you are charged an extra CHF 6.90 excl. VAT
Remember you will have to arrange new acceptance contracts for the payment methods you want for each space.
Check which payment method was used to pay for the order. Next, speak to the acceptance partner responsible (see question above “Which acceptance partners and payment methods are supported?”).
Once you have signed the contract, it takes one to two working days for the subscription to go live. To do this, go to Account > Subscription > Complete registration.
The time it takes to activate different payment methods depends on the acceptance partner in question.
No. As an alternative to registering a PostFinance business account, you can also register a Swiss credit card for charging fees. Payment is made to the Swiss bank account of your choice.
The activation fees and the monthly fees are charged to the PostFinance business account or the credit card each time.
PostFinance is always reviewing the current market situation, and continues to expand the number of plug-ins it provides.
Firstly, please get in touch with the supplier for your shop software. It may be the case that an API connection has already been set up.
Alternatively, PostFinance Checkout can be integrated via REST API web services. You can find detailed information at: The link will open in a new window checkout.postfinance.ch.
For more helpful information and tips on the topic, please visit The link will open in a new window github.com.
The user enters the payment details in an overlay. The form appears as an overlay on the retailer’s website.
The user enters the payment details in an iFrame hosted by us. The iFrame itself can be embedded in the retailer’s website.
Yes, you can personalize the payment screen according to your preferences. Select Space > Resources. In the editor, you can also customize the payment screen with a TWIG template.