What is the mailing address for sending in a check for my Credit Card payment? July 28, 2021 22:34 Updated Follow Please mail your payment to:SoFi Credit CardPO Box 981075Boston, MA 02298-1075 Related articles How do I payoff my Personal Loan? What is the SoFi bank address? Who is the loan servicer for my SoFi Personal Loan? / How will I make payments? / Who will I make my payments to? Contact Us I sent a check for my Personal Loan payment, why has it not posted?