| AE | Electronically After Shipping |
| AM | By Mail After Shipping |
| AU | By Data Pattern Indicates that a report will be transmitted across a telecommunications network using fixed-record images |
| BE | By Mail and Electronically |
| BM | By Mail |
| BW | Best Way (Sender's Option) |
| DA | Data |
| DC | By Direct Communication Line |
| EL | Electronically Only |
| FD | By Formatted Data Message |
| FX | By Fax |
| GS | On General Services Administration (GSA) Form 10050 Indicates that a report will be transmitted via GSA Form 10050 |
| IA | Electronic Image |
| IE | Electronically with Invoice |
| IM | By Mail with Invoice |
| KS | By Key-to-Share Process |
| MS | By Message |
| NS | Not Specified Indicates that a report will be transmitted via a nonspecified medium |
| PC | By Dial-Up Computer |
| PO | Printed Original Required |
| SE | Electronically Before Shipping |
| SM | By Mail Before Shipping |
| SN | With Ship Notice |
| TA | By Telephone |
| TE | Separately, Electronically at Time of Shipping |
| TM | Separately, by Mail at Time of Shipping |
| TX | Text |
| VO | Voice |
| WS | With Shipment (With Package) |