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 form acts as proof that you are financially capable of managing your stay in the United States.The affiant, the brother-in-law of the applicant, is providing financial support for the applicant's 1-year post-graduate program in Canada. You need a provincial attestation letter (PAL) or territorial attestation letter (TAL) to apply for a study permit. 1 and J1 visa students provide documentation that proves they have adequate financial resources to provide for their expenses and the expenses of dependents. Step 1: Read the guide and get your application package. Read the instruction guide carefully before you complete your application. Current students: If you area current student you may may complete the online form to request an appointment. ISSS provides international students and scholars with advice, information and referrals on matters such as immigration, employment and overseas travel.