Waiver of objection to admission of evidence

More importantly, no objection was made by petitioner when private respondents introduced evidence to show the right of repurchase granted by the NAC to Inez Ouano. It has been repeatedly laid down as a rule of evidence that a protest or objection against the admission of any evidence must be made at the proper time, and if not so made, it will be understood to have been waived. [G.R. No. 121506. October 30, 1996]