Most presort programs have difficulty sorting mail to non-postal sort schemes for One-Pass commingling and certainly cannot support the industry best practice of splitting a mailing between commingled and non-commingled portions to optimize postage. 1-PASS Prep™ can take an address list, determine which pieces would qualify for a 5-digit discount and to which entry points they would be entered (if not First-Class) and divert these address records to your current presort software. The remaining address records will get sorted to your commingler’s (or in-house MLOCR) sort schemes.