Regional level Grand Master David Ducay was appointed by the United World Serrada Escrima Federation as its Northern California representative (Northern California, United States), representing UWSEF and Serrada Escrima on behalf of the federation.

| Certificate | Number | Issued | Issued by | |
|---|---|---|---|---|
| Northern California Representative | UWSEF-REP-US-02 | 01 Oct 2023 | UWSEF — GM Anthony Davis (Maha Guru SGMD) & GM Mustafa GÜNAYDIN |