Which of the following condition must exist so that a promise to pay for the past voluntary services is binding?

Past voluntary service If a person renders voluntary services without any request or promise from another and the person receiving the services makes a promise to pay for the services, then such a promise is enforceable in India under Section 25(2)  of the Indian Contract Act, 1872 which states: ‘‘An agreement made without consideration is void unless it’s a promise to compensate, wholly or in part, a person who has already voluntarily done something for the promisor, or something which the promisor was legally compellable to do; or unless.’’ For Example - Peter finds Noah’s wallet on the road. He returns it to him and Noah promises to pay Peter Rs 500. This is a valid contract under the Indian Contracts Act, 1872.