Since this would be a 1099 contractor relationship and not an employee relationship, would there be any issue for Mattermark in this case? All they need is a T

Since this would be a 1099 contractor relationship and not an employee relationship, would there be any issue for Mattermark in this case? All they need is a TIN for their 1099 filing; it's up to the visa holder to know whether they are permitted to do contracting work.