I have incorrectly received a stimulus check as non U.S resident, how do I return this money and halt any future money coming through.

@tam971127  -  

here are the qualifications 

A1.  You may be eligible to receive a Payment if you:

• Are a U.S. citizen or U.S. resident alien;
• Cannot be claimed as a dependent on someone else’s return;
• Have a Social Security number (SSN) that is valid for employment (valid SSN); and
• Exception: If either spouse is a member of the U.S. Armed Forces at any time during the taxable year, then only one spouse needs to have a valid SSN
• Have adjusted gross income below an amount based on your filing status and the number of your qualifying children.

if you didn't qualify, it is your right to send the money back by making a check out the the US TREASURY.

  Suggesting enclosing your social security number and a small note explaining why you are returning, 

https://www.irs.gov/individuals/international-taxpayers/frequently-asked-questions-about-international-individual-tax-matters

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