We have a situation where the initial CD was sent via USPS on a Monday. The next day, Tuesday, a corrected CD was sent via E-Sign, consented and viewed that same day (minor correction that resulted in a loan amount difference of less than $20). The loan closed on Friday. Is this loan considered to have been closed too early based on the "mailbox" rule and when the initial CD was mailed? or is there no timing violation since a CD, albeit a corrected one, was received at least three business days before closing?

Not sure that you are going to find any specific guidance on this situation in the regulations. Since they actually received a CD three business days prior to closing, I am not sure there is any true violation other than possible borrower confusion.

Great, thanks!