Be very, very suspicious of any “potential” buyer who contacts you via text or email wanting to pay by cashiers check.
Cashiers checks can be easily forged. Thoroughly vet buyers whom you do not know personally. Those who are reluctant to go through a vetting process may be operating a scam.
Also, anyone truly interested in being a great owner for your special horse will not mind the extra steps. In fact, he or she should understand you are only interested in the very best future for your horse.
I share these words of caution from a place of personal experience. I am regularly contacted by these “prospective” buyers. Be cautious and don’t fall victim to those who seek to scam those of us in the horse industry.