If the routing number on the Constituent record does not match the routing number in Config>Financial Institutions, then indicates the bank is not correctly configured.
  • If the bank on the Constituent's Relationship tab is not the exact same one under Config>Financial Institutions, add a new bank
  • If the bank is the same, retype the routing number in the bank record in Config>Financial Institutions
Note: if you are processing transactions from a plugin, for example NetCommunity or Online Express, you must create a new Financial Institution. Do not link to an existing Financial Institution, unless it is exactly the same bank for the same constituent. Each Constituent must have a unique banking institution. 
For example, John and Jane share the same bank, however, their individual routing and transit number will be unique to their account, so they must each have a unique financial institution.