Which banking institutions does SeamlessChex support? Evan Albert March 29, 2021 15:18 Updated SeamlessChex supports all U.S. banks. A U.S. business checking account is required. Related articles What is the difference between eCheck & ACH payments? Do I need to print and deposit checks myself? Can I check if my customer has sufficient funds before depositing? Funding time for Seamless Chex Bank Authentication Customer Flow: Combat Insufficient Funds Comments 0 comments Please sign in to leave a comment.