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 Thankbox message cannot contribute more than £300/$300/€300 to a Thankbox.

If you need to collect more than that amount (lucky recipient!) then you can create another Thankbox to handle the additional contributions.