When you want to write a letter to Santa Claus, you have to take into account that he is a busy man.
We all know he lives in Lapland , specifically in Rovaniemi, where you can go and visit him in his office.
Santa Claus and Mrs. Claus in their Lapland house. Source (CC: by) 
Sending a letter to Santa Claus to his correct address
Each year in late November, the Christmas season is inaugurated in Finland. Joulupukki (the Finnish name of Santa Claus) visits every Finnish city or town in person, usually in the main square, to wish everyone a merry Christmas. It is extremely easy to go and meet him because normally the streets near the center have a system of underground heating that melts the snow and makes it easy for people to walk around.
You should know that any letter that says “Santa Claus” will magically reach its destination: post offices all around the world are warned and know how to handle the letters to Santa Claus.
But if you want Santa to know that you were so interested that you researched his address, you can put his correct one on the envelope.
Some kids meeting Santa Claus in person. Source (CC: by-sa) 
Santa Claus and his elfs (called Tonttu in Finland) will appreciate this detail and will know you worked for your presents. This is his address:
96930 Arctic Circle,
That’s right: the letter to Santa Claus will go all the way North to the Polar Arctic Circle, the imaginary line above which the sun doesn’t rise at least for a day per year, and where it doesn’t set at least for one day a year.
And here comes the best thing: if you add your return address, he will write you back. Isn’t that great?
How to make your letter to Santa Claus better
There is no magic recipe or template to make your letter to Santa Claus right, but there are some tips that will assure that you’ll be in his good graces.
Santa Claus doesn’t want you to sugarcoat the truth. He knows if you’ve been bad or good, so lying in your letter will make you look bad. It is better to acknowledge that there are some areas where you can work on to be better next year, and tell him how you became a better person this year. Being good is a constant process.
Thank him for last year’s presents, even if they weren’t 100% what you asked for. He has to handle a global operation each year after all. And don’t ask for too much! If you need something – a bike to ride to school with, something warm to wear for the extreme cold of winter in Finland  – make sure to tell him that. He prefers to read that you wish for things you need, not just want.
Joulupukki in Helsinki , measuring this girl’s back to send her a fitting coat. Source (CC: by) 
Good luck with this year’s Christmas gifts! This is our list of 12 ideas of Finnish Christmas presents , to give you inspiration. May Santa Claus and his Tonttu be generous, and you a good girl or boy.
Do you have some extra advice for the letter to Santa Claus? Some tip that worked for you?