The incident is reported to have happened at 10.15pm on 2 April 2021 in St Thomas Place.
The male victim was walking past two men near an alleyway when they are reported to have used a knife to threaten him and rob him of his bank card and rucksack which contained the victim’s passport and jacket.
The suspects are described as black, wearing face masks and both believed to be aged 18 to 23 years old.
One offender is believed to be around six feet tall and of medium build. He was wearing dark clothing and had his hood up which showed he had curly styled hair underneath.
The second suspect is described as around six feet tall and of slim build. He was wearing dark clothing.
Anyone with information is asked to call Kent Police appeals line on 01843 222289 quoting reference 46/54218/21.
You can also contact the independent charity Crimestoppers, anonymously, on 0800 555 111 or by using the anonymous online form on their website.