Ari owned acreage in a rural area. He sold a small portion of it to a neighbor in an informal transaction but made no record of the sale or change of ownership. A developer offered Ari several million dollars for the entire acreage, and Ari eagerly accepted the offer. What covenant is Ari in danger of violating

Seisin

Explanation:

The covenant of seisin is essentially a covenant that the grantor owns the estate that the deed says it conveys to the grantee. This covenant promises that no one else has any conflicting possessory interests, present or future. the sale of property to Ari's neighbor was never recorded, his deed still shows that he owns the entire parcel. Thus if Ari sells the land to the developer without informing his neighbour, he would be breaking the covenant of selsin.