Looking for logging into the G2a Invalid Form site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the G2a Invalid Form site. After that you can login as usual with your login credentials.
https://supporthub.g2a.com/marketplace/en/Problem-Solving/my-key-doesnt-work-what-can-i-do
https://www.reddit.com/r/pcgaming/comments/41lnvy/i_purchased_an_apparently_invalid_key_through_g2a/
https://support.cloudflare.com/hc/en-us/articles/200169676-Why-am-I-getting-an-invalid-token-or-email-error-message-
https://www.youtube.com/watch%3Fv%3D4U8bGm4UjFY
https://support.hypernode.com/knowledgebase/fixing-invalid-form-key-ongeldige-formuliersleutel/
https://stackoverflow.com/questions/36074754/invalid-form-key-please-refresh-the-page-on-magento-admin-login-page
https://community.magento.com/t5/Magento-1-x-Programming/Can-t-login-to-admin-quot-Invalid-Form-Key-Please-refresh-the/td-p/34434
https://www.cmdnet.org/i-get-an-invalid-token-error-message
https://forums.tripwireinteractive.com/forum/killing-floor-2/killing-floor-2-general/general-discussion-af/106190-psa-don-t-order-from-g2a-or-kinguin-ever
https://developers.google.com/recaptcha/old/docs/troubleshooting
https://www.eurogamer.net/articles/2017-02-03-controversial-pc-game-key-reseller-g2a-com-fights-fires-in-reddit-ama
https://techraptor.net/content/g2a-responds-g2a-dont-believe-half-truths
https://dfactory.eu/support/topic/invalid-captcha-after-entering-correct-answer/