---
title: "Why can't the tenant select a serial number or set a hold date when adding equipment to an invoice after serialization is enabled?"
slug: "why-cant-tenant-select-serial-number-set-hold-date-after-serialization"
updated: 2026-10-15T00:47:54Z
published: 2026-10-15T00:47:54Z
canonical: "help.servicetitan.com/why-cant-tenant-select-serial-number-set-hold-date-after-serialization"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://help.servicetitan.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Why can't the tenant select a serial number or set a hold date when adding equipment to an invoice after serialization is enabled?

## Problem

Users can't select a serial number for equipment or set the hold date after serialization is enabled.

## Solution

This workflow addresses issues caused by completed jobs blocking changes and ensures the hold date aligns with serialization requirements.

### Resolving Serial Number and On Hold Date Issues

1. **Check the On Hold Date:**
  1. Verify the *On hold* date for the invoice: If the *On hold* date is set to a date before serialization was activated, the system will not allow a serial number to be added.
  2. Update the *On hold* date to a date after serialization was enabled.
2. **Check the Job Status:**
  1. Review if the job associated with the invoice is marked as completed. A completed job may prevent changes to the *On hold* date.
3. **Re-Complete the Job:**
  1. If the job is completed, re-complete it to allow updates to the hold date.
  2. Navigate to the job associated with the invoice and find the option to re-complete the job.
4. **Update the Hold Date:**
  1. After re-completing the job, ensure the hold date is set to a date after serialization was enabled.
5. **Add the Equipment:**
  1. Return to the invoice and attempt to add the equipment again.
  2. You should now be able to select a serial number.
  3. Verify that the equipment is added with the correct serial number and that the hold date is updated successfully.