The entirely free service will allow visitors to send a Cadbury chocolate gift to a loved one anonymously, just because.
The postal service will arrive in Leeds on Saturday 15 December and will be located at Albion Court, Albion Street from 12.30pm until 6.30pm.
Secret Santas will have a variety of Cadbury chocolate gifts to choose from, which can be posted to any destination in the UK.
The range of chocolate bars include:
- Cadbury Dairy Milk
- Cadbury Dairy Milk Whole Nut
- Cadbury Dairy Milk Caramel
- Cadbury Dairy Milk Fruit and Nut
- Cadbury Dairy Milk Winter Edition
The postal service will be popping up at ten locations around the UK, beginning in the Isle of White and ending in Edinburgh on 17 December.
The service is available on a first come, first-served basis.
Booking is not required to get involved.
Read more on Christmas in Leeds:
Apply to be Father Christmas or Santa's Elf in Leeds and earn extra cash this ChristmasLeeds German Christmas Market 2018 dates, opening times, food and drink and Santa visitsLeeds Christmas Market 2018 prices: How much is beer, mulled wine, German sausage and waffles?Remember Christmas in Leeds in the 1980s