When is the last day I can send a one-time payment to Firstmark? September 26, 2023 10:13 Updated Your last day will be Oct. 31, 2023. Related articles Can I use my international account to make payments to Launch? Do I have to sign up for autopay again? What visas are eligible to refinance my loan? What is the status of my application to refinance my loan? Do I have to reside in the U.S. to be eligible to refinance my loan?