Open ACH File
ACH extension files are commonly associated with the Medlin Payroll Software Automated Clearing House.
More about Medlin Payroll Software Automated Clearing House
It is an automated payroll control and calculation software developed exclusively for companies based in the United States of America.
In fact, there is no way to connect (Only through a VPN) with their website, outside of the US territory.
If the user is behind a VPN that points to a foreign address (outside the USA), the website blocks them and does not allow their access.
However, it is possible to request an unblocking for the IP address by writing an email to Medlin.
Medlin Accounting developed the Medlin Payroll Software Automated Clearing House and thus also the associated format in an ACH file.
The ACH extension file is a Database of all transactions made with the Payroll software.