Has information you must know before you submit your application, and; explains how to fill out the forms and gather your supporting documents. Learn all about writing an affidavit in support of student visa for your education abroad, with two sample letters for reference.Sample of Affidavits: AFFIDAVIT REGARDING SPONSORSHIP DECLARTIION 1. You must prove that you can support yourself and the family members who come with you while you are in Canada. An affidavit of support is a legal document that demonstrates financial backing for a foreign national seeking to immigrate to Canada. This is a sample letter for F-1 and J-1 supporters, showing that they are providing monetary support to students. Sharing you my personal AFFIDAVIT OF SUPPORT and LETTER OF FINANCIAL SUPPORT when I applied for CANADA STUDY PERMIT. Completing and signing Form I-864 makes you the sponsor. An F-1 student visa or a DS-2019 form for a J-1 visa. Submission of this completed form is necessary for the university to issue immigration documents required for obtaining a student visa.