I have more than one gift card, can I use more than one on the same order? Abi 30 April 2020 11:11 Updated Yes, there is no limit on the amount of gift cards you can use for your order. Related articles How does your clinic service work? I’ve received an email to say my sample has failed. What should I do? When will I get my results? Do I need to spend the entire gift card amount at once? Comments 0 comments Article is closed for comments.