Stimulus Check Update April 11th 2020
Here is the Kiplinger article that outlines the stimulus check mailing schedule for paper checks. https://www.kiplinger.com/article/taxes/T054-C000-S001-when-will-i-get-my-stimulus-check-2020.html
Here is the Forbes article citing the Washington Post as the source for the paper check schedule.
https://www.forbes.com/sites/zackfriedman/2020/04/09/stimulus-check-dates/#27d1f425588c
IRS Economic impact payments
https://www.irs.gov/coronavirus/economic-impact-payments
Bank Routing Number Verification