Much like how credit card companies set a credit limit on credit cards to limit risk, banks also set a limit on incoming ACH donations. There's a maximum amount of money that donors can give via ACH in a single transaction, and this amount is called the high ticket limit. All organizations start out with a $1500 limit, and after 90 days of processing with GivingFire we automatically lobby your bank to raise your ticket limit. Your limit is then raised by how much processing you've done, and we can revisit that limit again later as your organization grows.
GivingFire's software is aware of your high ticket limit, and will warn donors if they try to give above that amount via ACH, and recommend they give through card or split up their donation into multiple transactions.