Colleges limit the amount of credit that can be transferred into their institution. Typically a student can only transfer 60 credits or less! This is because colleges want to regulate student outcomes to ensure students reflect their academic standards while also capturing the maximum revenue per student.
This is part of the reason the average college student loses almost half their credits upon transfer.3
Another cause of lost credit has to do with accreditation. Every legitimate college is accredited, but not all accreditation is equal. Regional Accreditation is the most widely recognized form of accreditation in the U.S., with 85% of colleges and universities fall into this category. If the college credit a student earns is not regionally accredited, it's very unlikely to transfer to another college.