In which of the following scenarios might consent to enter property not be valid?

Consent to enter property is a legal concept that typically requires the agreement of the property owner or an authorized individual. However, there are scenarios where this consent may not be valid. When consent is obtained under duress, it is not considered legitimate due to the coercive circumstances involved. Duress implies that the individual granting consent is being pressured, threatened, or forced to provide permission against their will, which undermines the voluntary nature of consent.

In contrast, valid consent can be given by a property owner freely, and while identification may be relevant in establishing authority, the absence of proper identification does not automatically invalidate consent if it is still granted. Additionally, the form of consent—whether verbal or written—does not inherently affect its validity, as long as it is given voluntarily and without coercion. Therefore, the scenario where consent is obtained under duress is a clear instance where the consent would not stand legally, making it the correct answer.