Neocon

IRS https://www.irs.gov/tin/itin/individual-taxpayer-identification-number-itin U.S. Embassy, Bangkok https://th.usembassy.gov/u-s-citizen-services/local-resources-of-u-s-citizens/notaries-public/notaries-public-2/certified-true-copies-of-a-foreign-passport-for-use-with-individual-taxpayer-identification-number-itin-applications/

Glad it worked out for you. You had phoned the Defense Manpower Data Center (DMDC) Support Office (the office that manages DEERS). You'll notice that the letterhead on your TRICARE proof of eligibility letter is from DMDC. TRICARE has no involvement with determining one's coverage eligibility.

OneZero Posted: "Military retirees under age 65 are entitled to free overseas TRICARE health care funding, ..." For TRICARE Select and TRICARE Select Overseas, ENROLLMENT and continued payment of the monthly enrollment premium is required to retain access to civilian care under TRICARE: https://tricare.mil/Plans/Enroll/SOS https://www.tricare-overseas.com/beneficiaries/plans-and-programs/tricare-overseas-program-top-select/tricare-select-retirees As some local TRICARE Select Overseas US military retirees (retired for longevity) have learned the hard way, when you miss a monthly enrollment premium payment, your access to civilian care under TRICARE is suspended. To request reinstatement, one must contact TRICARE Overseas. Contact TRICARE Overseas: https://www.tricare-overseas.com/contact-us/country?tricareRegion=pac&country=thailand