To modify the numbering sequence for Batch Payments, follow these steps:

1. Enable Developer (Debug) Mode:
   • Go to the Settings menu and click “Activate the Developer Mode” (usually found at the bottom of the page or under the debug icon).
2. Navigate to Sequences:
   • Go to:
     Settings > Technical > Sequences & Identifiers > Sequences
3. Search for the Batch Payment Sequence:
   • Look for "Batch Payment Number Sequence" in the list.
4. Edit the Sequence:
   • Click on it to change the Prefix, Sequence Size, or Next Number as needed.

⚠️ Be cautious when editing sequences, especially in live systems, as they impact document tracking and references.

Hello there,

You can set the prefix for Journal,

GO to Accounting> Configuration>Journals

Then select the Journal & edit the  Sequence Prefix. For existing one.

Else

Create a Journal:

GO to Accounting> Configuration>Journals

And then go to 

Settings → Technical → Section : Sequence & Identifiers → sequences

Create a sequence and must  mention the Sequence Code to which place the sequence is to be reflected

As a result of account.payment, when I pay the Invoice with XYZ Cash

The Payment is made with the desired sequence

Accounting → Customers → Payments

Where you want to change the sequence, Must specify the Sequence Code [Where to apply-> Need to know the correct model name]

I hope this will help you to achieve your req  w/o code.

Thanks!

Firs Enable the Debug Mode then go to:
Settings>Technical>Under Sequence & Identifiers>sequences>Batch Payment Number Sequence.
You can make changes in the sequences number here

For journal you can link  individual sequence