An officious intermeddler is a person who voluntarily, and without request or pre-existing legal duty, interjects themself into the affairs of another, and then seeks remuneration for services or reimbursement.
An exception to this rule, however, is if a doctor gives medical treatment to an unconscious victim.
Therefore, no contract was made, and the intermeddler has no legal recourse to claim compensation.
However, certain legal jurisdictions provide for an implied-by-law contract, called a quasi-contract, that exists solely for the purposes of remedying this unjust enrichment by giving a court legal means to enforce compensation.
The distinction between an officious intermeddler, and a party operating under a quasi-contract, is that the recipient of the goods or services has knowingly accepted the goods or services, with the intention of benefiting from them without providing compensation.