Hello My Friend! We are tech-savvy professionals working with the trustworthy or you can say award-wining tech-support organization. We are highly skilled and qualified enough so dealing with your problematic hurdles is just a piece of cake for us. We are actually having the ability to tackle all your complicated QuickBooks problems including QuickBooks error 15215 as well. The Error 15215: Unable to verify digital signature is the one common problem generally been caused by a conflict with another application running in the background when downloading a payroll update. We have one-stop solution to this error, so instead wasting your precious time, utilize it by making connection with us. We are 24/7 support service provider and care for you. We never let down the person for any reason.