Hi,
The ReCaptcha plugin is made to block any creation of a user in the front-end without the captcha data.
If you want to allow a component to create a user without any ReCaptcha check, you should add an authorization in the ReCaptcha plugin, for the function "onBeforeStoreUser" in the plugin.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.