I have received a few international funds over the years and they always had $15.00 missing. Customers always claimed to have sent the right money and the banks here couldn’t answer where it went.
Didn’t matter what country it came from.
It did go up to $18.00 a few years back, not sure what it is now.
I used to wear it as it would be taken from a frame kit price but then I once shipped some small parts and it took the bloody profit right out of the job.
Scaping a bit from the top of every international transaction is going to be my next business.
Paypal is so much easier, they take a bit more on larger amounts but at least you know where you stand.