Understand the Affidavit of Support sample with this comprehensive guide and sample. Much confusion surrounds the need to submit I751 affidavits and how to write them.We explain and provide an I-751 affidavit sample. Find Local Rules and Forms that provide procedures and guidelines for courts in Mecklenburg County. Call 704-432-9300 (Option 7). Learn how to create an effective affidavit of support with our detailed guide and sample. This affidavit must renewed annually at the beginning of each school year. AFFIDAVIT.