We searched for this church and found it is a well-documented national denomination, not an unverifiable local name. The Lutheran World Federation's member list includes the Église Fraternelle Luthérienne du Tchad among its Chadian member churches (French Wikipedia page on the Fédération luthérienne mondiale). Chadian news outlets report regularly on it: a 2023 thanksgiving service in N'Djaména for its first pastor to earn a doctorate in theology, held at the Palais du 15 janvier (NDjamena Hebdo), and its centenary in 2020, when it was described as having over 50,000 communicant members, more than 700 parishes and 26 consistories (Journal Chrétien; also Alwihda Info, Le Pays). A map listing shows a parish in N'Djaména with Sunday morning service times (Mapcarta, Am-Riguebé parish). We found no scam reports, complaints or warnings, and the contact address is a free Gmail account, which is common for churches in Chad.
Our conclusion: The Église Fraternelle Luthérienne au Tchad is a well-documented Chadian denomination listed among the member churches of the Lutheran World Federation, and Chadian news outlets have reported on its centenary in 2020 and on a 2023 thanksgiving service held in N'Djaména. An independent map listing also confirms a parish in N'Djaména with Sunday morning service times, matching the city given in this signup. Lutheran churches hold the historic Trini
No further action is needed. This report is refreshed whenever the church is reviewed again.