📄️ Transfer with pre-validation
This is the case when you want to use the validatereferrer function on creation of the referee's account. If the validation succeeds, then you need to save that referrer public key (and optionally referrer member to use on-chain analytics) on an account so that you can validate later when a transfer needs to happen. Last step being you uncheckedtransfer making sure the passed referrer's account's key (and optionally referrer's member key) is equal to the one previously saved.
📄️ Transfer without pre-validation
This is the case when you don't want to use the validate_referrer at all. This means that you will be using the secure version of the transfer instruction. The first and only step is the transfer instruction to be called.
📄️ Transfer only when requested
This is the case when you don't want to do the transfer CPI everytime your referrer receives rewards, but only when he requests them. This can be done via the validate/unchecked transfer flow or the secure transfer flow. The only difference is that the transfer instructions are actually CPI called by a new instruction that you add on your program to claim pending rewards. Obviously this needs validation, but can easily be done permissionless.