[mothered]

DNA help

Question: Because it is ink and stencil papers, I wanted to say that ink spilled all over my papers and I just threw it right away

Given you're planning to use the DNA, you're not supposed to have received the package, hence your approach (above) contradicts your Intention with the method Itself.

but deliverer didn't ask for signature.

If no other form of verification was provided to the driver, It's perfect DNA material.

he saw me and we spoke a little.

Although his word holds no value to verify consignments, nonetheless, what did your conversation Involve?