[AlphaCommerceHub] What will happen if a not configured for 3D Secure merchant will pass `3DSecureBypass = Y` in an AlphaHPP request?

Will the 3DSecureBypass parameter be silently rejected by AlphaHPP, or the request will be failed?

See also:

This will prevent the AlphaHPP from invoking the 3D Secure process at checkout. It allows the merchant to control if 3D Secure is applied on a per request basis.

I do not understand your answer.
If a merchant is not configured for 3D Secure in the AlphaCommerceHub merchant interface, how can 3DSecureBypass = Y «prevent the AlphaHPP from invoking the 3D Secure process» (it is already prevented!), and how can the merchant «control if 3D Secure is applied on a per request basis»?

Nothing will happen. If merchant is not configured for 3DS this parameter is ignored