#  Starting New Invoice Series (Prefix Format) After Prior E-Invoice Submission

**URL:** <https://zatca1.discourse.group/t/starting-new-invoice-series-prefix-format-after-prior-e-invoice-submission/8775>\
**Category:** General\
**Created:** [October 21, 2025, 9:03am UTC](https://zatca1.discourse.group/t/starting-new-invoice-series-prefix-format-after-prior-e-invoice-submission/8775 "2025-10-21T09:03:34Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![mohammed930](https://avatars.discourse-cdn.com/v4/letter/m/96bed5/32.png) [@mohammed930](https://zatca1.discourse.group/u/mohammed930)\
**Post date:** [October 21, 2025, 9:03am UTC](https://zatca1.discourse.group/t/starting-new-invoice-series-prefix-format-after-prior-e-invoice-submission/8775/1 "2025-10-21T09:03:35Z")

</div>

Hello,

Previously, we were using numeric serials for our invoices (e.g., 1, 2, 3 … 24568) as all invoices were published from one device.

Now, we have updated our system so that each branch can publish invoices with its own prefix, for example:

```auto
GG-INV-1, GG-INV-2, GG-INV-3, GG-CR-1, GG-CR-2  
BD-INV-1, BD-INV-2, BD-INV-3, BD-CR-1, BD-CR-2

```

However, before applying this new format, we had already published one invoice and one credit note using the format:

```auto
GG-1 and GG-CR-1

```

Now we want to start using the new format from:

```auto
GG-INV-1 for invoices and GG-CR-20 for credit notes.

```

My question is:

- **Is it acceptable to ignore the two previously published documents “GG-1” and “GG-CR-1”** (which were the first submissions under the new CSID) and start using the new serial format from now (GG-INV-2, GG-CR-20)?

Kindly advise on the correct approach to ensure ZATCA compliance.

Thank you.