Halakhah su Deuteronomio 24:2

That is that He commanded us to marry with kiddushin: To give something into the hand of the woman; through a contract; or through sexual intercourse. And that is the commandment of kiddushin. And the hint to this is, "When a man takes a wife, and marries (which can also mean, has intercourse with) her etc." (Deuteronomy 24:1) - indicating that he effectuates [the marriage] with intercourse; and His saying, "And she leaves [...] and becomes" (Deuteronomy 24:2) - since just like the leaving (divorce) is with a contract, so too is the becoming (marriage) with a contract. And likewise have we learned that [it is effectuated] with money, from His saying about a Hebrew maid-servant, "there is no money" (Exodus 21:11) - to this master, there is no money, but there is money to another master. And who is that? The father [of a bride]. But kiddushin from the Torah is nevertheless explained to be with intercourse, as is explained in [various] places in Ketubot, Kiddushin and Niddah. And the regulations of this commandment have already been completely explained in Tractate Kiddushin. But women are not obligated in this commandment. And in the explanation, they said (Kiddushin 9b), "Kiddushin with intercourse, which is from the Torah." (See Parashat Ki Tetzei; Mishneh Torah, Marriage.)

To marry a woman with a marriage contract and betrothal: That we were commanded to acquire a woman in one of three ways before the marriage. And the sages elucidated these ways (Kiddushin 2a) - that they are money (monetary value), a contract and sexual relations with her. And about this is it stated (Deuteronomy 22:13), "If a man takes a woman and has sexual relations with her," which is to say [that] if a man wants to take (marry) a woman for himself, he should acquire her first with sexual relations. And about that which the verse stated (Deuteronomy 24:2), "And she shall go out [...] and she shall be," the traditional understanding came [to explain] that [just] like the departure (divorce) of a woman is with a contract - as we will write in this Order (Sefer HaChinukh 579), with the help of God - so too is [her] being with him; meaning to say, the acquisition of a woman is with a contract. And they, may their memory be blessed, also learned (Kiddushin 4b) that she is acquired with monetary value, since it is written about an Israelite maidservant (Exodus 21:11), "and she shall go out, there is no silver (monetary value)" - and the understanding about it came [to explain] (Kiddushin 3b), "'There is no monetary value' for this master, but there is monetary value (when she goes) from another master. And who is he? Her father."