How to add a contribution to a Thankbox?
Adding a contribution to a Thankbox is very easy - you just do it when you add your message.
The first step is to open the Thankbox you wish to contribute to. Then click on
Add a message and write your wishes for the recipient. At that point, you can also add a photo, GIF or a video (if the Thankbox is Premium).

At the bottom of the screen, you will see a section called
Gift Collection, where you can enter the amount of money you want to contribute or choose from the suggested options. Once you select the amount, you will be asked to provide your payment details. The total amount will include a processing fee (for more info read
why is there a processing fee for adding to a gift collection).
Once you're done click on
Pay X and post message. Once your payment is successful you'll be taken back to the main Thankbox page where you'll see your message.
Shortly after you will receive an email with your receipt and a confirmation email that your message and contribution have been added.