This in from Ingenico this week:
Dear Ingenico Customer,

We would like to inform you that on October, 13th 2020 we will renew our SSL certificates for the *.gcsip.com domains. The renewal is necessary because the old credentials expiring soon.

If you are connecting to Ingenico through ca.gcsip.com, please take the following actions before middle of October:

• If you are using an up-to-date trust store you should check if the Trustwave CA certificate is included. If yes, then no further action is required.

• If you do not use the trust store or the Trustwave CA certificate is not included, then you can whitelist our SSL certificate in your key store. Please find the new certificate (in P7B format) attached.

The change will allow you to safeguard your business continuity after October 13th 2020. Should you have any questions, please let us know.

You can find more information on Trustwave support site: https://certs.securetrust.com/support/support-faq.php