邀请函需要中英文两件，正文最后要被大使馆收走。邀请书写明自己的性别年龄，护照号，枫叶卡号，留学移民加拿大进程，申请公民身份计划，住址，工作单位，年收入，父母姓名，出生年月，护照号，与邀请人的关系，访问的目的，访问期限(写的越短越好)，访问期间住在哪里，自己会承担父母在加拿大的一切费用，父母也有能力自己承担，保证按时回国、并计划访问美国(所以请求多次往返)。
另外，给签证官的邀请书，要亲笔签字。
邀请书范本：
Invitation letter
Dear Mom and Dad: How are you doing these days Finally we are all set at our new home. It's in a very nice area, quiet and has more space. Celina likes her new school. She's already made friends there. We are excited about having our own place, after all this is a big event in our lives, and we'd like you to share the happiness with us, so we decided to invite you to come visit us this fall. In the meantime, you can take a look of Canada. The city we live in now is Mississauga which is about one hour and half away from Niagara Fall which is a famous place in the world. You will be impressed by the stunning view there. Other than the beautiful scenery, you will also enjoy the delicious food here, especially for dad. I know, as a chef for decades, dad has always been interested in testing different gourmet, so this will be a good chance for him. I know, to compare with the warm and humid weather in Shanghai, you must not feel comfortable with the cold and dry winter here, so you can back to Shanghai around the end of November before the real winter comes. Does this sound a good plan to you?I prepared the documents you will need on my side for applying the visa and mailed to you. We are looking forward to your visit. Good luck! Love, XXX Jun 27,2011