一.国外邀请人应该提供以下材料:
1. 邀请人发出的邀请信Invitation letter
2. 邀请人的护照复印件和拘留许可复印件

二.国外邀请人应该提供以下材料:
In order to get an entry visa to Tonga, every applicant needs to submit the following:
申请人需要提供以下资料以取得汤加王国入境签证:
1.    有效期至少 6 个月的护照Passport with validity of at least 6 months
2.    护照复印件，身份证复印件以及户口本复印件各一份。Photo copy of passport, Chinese ID and Chinese Household Registration Book
3.    英文填写完整的签证申请表格，附 1 张2 寸本人近期照片Completed Tonga Visitor’s Visa Application Form with a 2 inch recent photo attached
4.    申请人所在单位的营业执照复印件
5.    单位派遣函，须包括在职证明、收入证明及公司准假证明等内容！！Certificate of Employment
6.    如果出国经费没在派遣函中说明是单位承担，必须出具申请人银行存款证明(不少于 5 万人民币) Certificate of Income and certificate of deposit of no less than RMB50,000.00.  
7.    无刑事犯罪公证书原件Notarial certificate of no record of criminal (Original)
8.    机票订单及酒店订单(我单位可以出具)Air ticket booking record/reference and hotel booking record
9.    已婚申请人，需提交配偶同意该申请人申请签证及旅行的信件Married applicant should also provide a letter from the spouse