Please see the following excerpt from the IRS website concerning why you may have received a paper check:
I requested DD but
got mailed a check:
I
requested a direct deposit refund. Why are you mailing it to me as a paper
check?
There are three
possible reasons. They are as follows:
- We
can only deposit refunds electronically into accounts in your own name,
your spouse's name or in a joint account.
- A
financial institution may reject a direct deposit.
- We
can’t deposit more than three electronic refunds into a single financial
account.
https://www.irs.gov/refunds/tax-season-refund-frequently-asked-questions>
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