To claim your SSS sickness benefit as an OFW, you must have made at least three monthly contributions within the 12-month period before your sickness. You'll need to submit a sickness notification, your SSS number, and medical certificates from your healthcare provider. It’s also helpful to prepare valid ID and any additional documents requested by SSS. For detailed guidance, check the official SSS website or consult with a representative to ensure you have everything in order for your claim.