Vaishnava Dharmashastra 3.82

3.82

yeṣāṃ ca pratipādayet teṣāṃ svavaṃśyān bhuvaḥ parimāṇaṃ dānacchedopavarṇanaṃ ca paṭe tāmrapaṭṭe vā likhitaṃ svamudrāṅkitaṃ cāgāminṛpativijñāpanārthaṃ dadyāt ||

To those upon whom he has bestowed (land) he must give a document, destined for the information of a future ruler, which must be written upon a piece of (cotton) cloth, or a copper-plate, and must contain the names of his (three) immediate ancestors, a declaration of the extent of the land, and an imprecation against him who should appropriate the donation to himself, and should be signed with his own seal.