An organization has imported records from Import-O-Matic and notice the Constituency field is blank on some gifts. This will happen if no Constituent Code is present on the record (Bio2).
When adding gifts to a constituent record, the gift Constituency value automatically populates from the primary Constituent Code value on the constituent record. If there is no Constituent Code on Bio2, the value will be blank on the gift. Review the import file going forward to ensure a Constituent Code is included as well.