No code is needed for Verde's standard four-step welcome package. Codes advertised elsewhere are portal exclusives - each tied to signing up through that specific site.
Why every site shows a different code
One review site advertises a 500% match with its own code, another a 20-spin offer with a different one. Both are genuine, both are that site's arrangement with the operator, and neither works from anywhere else. If a code does not come with the offer you are actually claiming, it will do nothing at the cashier.
Where a code goes when there is one
Codes are entered in the bonuses area of your profile, before the deposit that the offer applies to - not after. The same activate-first rule that governs the welcome steps applies here, and it is the most common reason a bonus fails to appear.
The package that needs no code at all is on the welcome bonus page.