To use the PaymashPay card terminal for Paymash, you must first have an account with Adyen.
If you do not have an account yet, please contact Paymash Sales Team (firstname.lastname@example.org).
After you receive a terminal, please do the following steps:
Log in to https://app.mypaymash.com/ and go to Settings → Payments.
Create a payment type with the name "PaymashPay". The upper and lower case must be correct.
Then in the app go to Settings → Terminals and click on PaymashPay. From the list select the correct serial number of the terminal . You can find the serial number on the back of the device.
Now your terminal is properly connected to the app and payments can be accepted successfully.