Here in NM, a significant number the original Spanish land grants were ignored and replaced by new grants to (generally) Anglo owners. Fortunately, some of them were sufficiently cogniscent of the paradox of colonialism overriding colonialism that the new grantees re-issued (smaller) grants back to the owners under Spanish or Mexican law.
Ironically, there were also some Spanish land grants that took so long to process, Mexico had already declared independence from Spain before the legal process was complete, and this left a number of them in a strange form of legal limbo at the time of the treaty.
https://www.gao.gov/products/gao-04-59
Here in NM, a significant number the original Spanish land grants were ignored and replaced by new grants to (generally) Anglo owners. Fortunately, some of them were sufficiently cogniscent of the paradox of colonialism overriding colonialism that the new grantees re-issued (smaller) grants back to the owners under Spanish or Mexican law.
Ironically, there were also some Spanish land grants that took so long to process, Mexico had already declared independence from Spain before the legal process was complete, and this left a number of them in a strange form of legal limbo at the time of the treaty.