It depends on the amount of the interest paid. According to the IRS rules, you must issue the Form 1099-INT to whom you paid amounts at least $10, or at least $600 of interest paid in the course of your trade or business
To report this income, the borrower who pays the interest completes a Form 1099-INT and submits one copy to the lender and one to the IRS. The form spells out the total amount of interest paid to the lender during the tax year.
You can find more information about that here:
Specific Instructions for Form 1099-INT