My daughter married a foreign national. They live in Africa. She still has a checking acct here in the US. He recently was employed by a large multi national company headquartered in a 3rd country. It would be advantageous for his salary to be deposited into my daughter's checking account rather than into a bank account in his home country. Are there any ramifications vis-à-vis US banking laws, the IRS etc with respect to adding him to her bank account. He does not have an SSN. The amount of his salary would be about $2500 per month with occasional deposits as high as $5000 (quarterly bonus time) Thanks.

well, it certainly would be nice for both of them if the country he is working in has a higher dollar value then US or Canada right now. What he should do, is open a bank account in both their names where he is, and she transfer the money in her name to her bank account in the US. That would eliminate the SSN no. problem for him. But, they will have to pay taxes on any amounts going into the US bank account. You probably realized that anyway.

Why don't you act as her proxy and invest it when it comes over. Still taxes might have to be paid. I would call an investment banker and see how it could be done. These are large amounts and should be handled with kid gloves to the best advantage. But, the exchange rate is the question. Is their exchange rate higher ?