1940 Unauthorized Censorship by Cebu Postmaster

1940 SPAIN to CEBU, censor resealing tape folded at left side. 
Censored by the Cebu Post Office by NICOLAS SANTIAGO, Postmaster.
Dated JUL 22 1940. Privately received on JUL 26.
Is the censorship for real or a favored one? The reason I am asking this question is that I have gone through several hundreds of covers of the same period that passed through the Cebu Post Office and by coincidence the five other covers that I have seen bearing the same censorship were all addressed to Mr. Reynes. 

Of the five, two had the same brown re-sealing tape folded at the left side while the other three had ordinary brown gummed paper tape on them. I believe that re-sealing tape is of local origin as like the above, the other five  cover showed no sign of censorship at origin.