Of course you can, yes!
When you have added your cards to your basket, there is a check box underneath the description of the cards that says:
Check if this is this a Gift? – By checking this box we will include a card, and if you like, a personal message from you in the package.
Leave us your instructions and message in the Order Notes box on the Checkout Page, which can be found underneath Deliver to address.
PLEASE NOTE: Make sure you add the additional delivery address so we send your parcel to the correct location for you.
We do not put an invoice in your parcels as you will receive one from PayPal.