What is the best way to prove valid consent for a search?

Obtaining proof of consent in writing is the best way to prove valid consent for a search because it provides clear, tangible evidence that the individual agreed to the search. Written consent eliminates ambiguity about whether consent was given and what the individual consented to. It also serves as a formal record that can be referenced later if needed, such as in legal proceedings.

In contrast, verbal consent may lead to disputes regarding what was agreed upon, as it relies solely on the memory of the parties involved. Conducting a search without consent could lead to legal challenges regarding the legitimacy of the search, as it may violate the individual's rights. Having a witness confirm consent can be helpful, but it may not carry the same weight as written proof, especially if the witness's account is called into question later. Written consent is therefore the most reliable form of evidence in establishing that valid consent was given.