Upon what condition can a minor sign a contract with a foreign club?

A minor can sign a contract with a foreign club only with the mandatory approval of their guardian. This requirement is in place to protect the interests of minors, acknowledging that they may not have the legal capacity to fully understand the implications of a professional contract. The involvement of a guardian helps ensure that decisions made are in the best interest of the minor, as guardians are typically expected to act in the minor's welfare.

Other options do not align with this legal framework. In many jurisdictions, minors cannot enter into contracts without adult supervision or consent due to their limited legal stature. The notion that no conditions are necessary or that only the child's consent is sufficient neglects the legal protections typically afforded to minors in contractual agreements. Similarly, considering only age overlooks the critical component of guardian involvement, which is a key factor in validating contracts signed by minors.