First of all some background:
I took a job last year in a new country. One of the only two people in the team when I arrived who is still here will leave the team in a few weeks. I'm really grateful that this co worker accompanied me during this time and that he contributed to making feel welcomed in a new team/company/country.
I want to express my gratitude but I'm not sure what's the best way to deliver that message and when. I do this from time to time and I usually write a message or something like that but that always feels kind of forgettable and cheap in that case.
Any ideas on how to show the gratitude in text form in an appropriate way? (Also more generally speaking and not only restricted to this case, collecting some ideas)