# Step 3 — What must pass before the next step: mandated step order in regulated processes

For Step 3, process is Appendix D stand-alone single transaction ISF bond submission; jurisdiction is United States (CBP); order is 3; deadline is within 12 hours of receipt of the unique ISF transaction number, recorded from its source on 2026-08-11.

- **Step:** Step 3 _(verified: appears in the quote below)_
- **Process:** Appendix D stand-alone single transaction ISF bond submission _(our reading, not quoted from the source)_
- **Jurisdiction:** United States (CBP) _(our reading, not quoted from the source)_
- **Order:** 3 _(verified: appears in the quote below)_
- **Deadline:** within 12 hours of receipt of the unique ISF transaction number _(verified: appears in the quote below)_

## What the source says

> Step 3: An electronic copy of the bond containing the unique ISF transaction number must be created in a .pdf or .tif format and e-mailed to the ISF_Bond@cbp.dhs.gov mailbox within 12 hours of receipt of the unique ISF transaction number.

## Source

- https://www.cbp.gov/sites/default/files/documents/10_2faq_0.pdf

Last verified: 2026-08-11. Review by: 2027-08-11.
Part of [What must pass before the next step: mandated step order in regulated processes](https://referencesource.org/prerequisite-sequencing-regulated-processes/).