Is there a limit to how much cash can be collected for a gift card?
You can collect a maximum of £400/$400/€400 in a Classic Thankbox.
This limit is increased to £1,000/$1,000/€1,000 for a Premium Thankbox.
A single contribution is limited to £250/$250/€250. If you'd like to contribute more than you'd have to do it in multiple contributions.
If you need to collect more than that amount (lucky recipient!) then you can create another Thankbox to handle the additional amount.