This form must accompany a bank statement or letter from the bank. This affidavit will be considered valid for six (6) months from the date of completion.You need a provincial attestation letter (PAL) or territorial attestation letter (TAL) to apply for a study permit. Basically in the letter, they should state your name and details and confirm that they are willing to support you, also state their yearly income detailed. This affidavit of support provides financial sponsorship for a student. The sponsor certifies that they are willing and able to support the student financially. 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. Completing and signing Form I-864 makes you the sponsor. Gather all necessary documents.