Nothing personal here but that is your fault. Insist on a boarding contract for your protection, boarders absolutely, positively need one. So do the barn owners/operators (whoever you pay every month). Not having a contract allows shady practices to thrive.
Any barn I’ve been in with any buy/sell/lease business (which is the vast majority) covered expectation, responsibility and commission on those transactions in the boarding contract.
And yes, even small private barns I boarded at had a boarding contract even if it was only two paragraphs. Also, yes I have had to produce a boarding contract (and in one case proof of ownership). Twice, once after a barn was foreclosed and seized by authorities and once when the trainer/BM was physically evicted immediately from the property by law enforcement at the direction the property owner/landlord.
In a third case, I saw signs I didn’t like and left one barn a few weeks before ATF raided it for guns and drugs. Everybody who was still there had to show valid contract and proof of ownership before removing their horses and the feds were not easy to deal with as far as their tack and equipment.
Now, that was over a span of about 55 years and, I dunno how many barns in 3 states, likely well over 20 if you count the known to be temporary places and those that didn’t work out.
But you need a CONTRACT when somebody else gets paid to take care of your horse.