Petitioners must rely on strength of own title to land

Petitioners bare and unsubstantiated allegation that respondents tax declarations were fraudulently issued is insufficient to sustain the imputation of fraud considering that good faith is always presumed. Besides, respondents tax declarations are deemed regularly issued. Being an action involving property, the petitioners must rely on the strength of their own title and not on the weakness of the respondents claim. [G.R. No. 109262. November 21, 1996]