Allow -ve Bill Amount Only for Credit Bills

YouTube: How to Allow Negative Bill Amount Only for Credit Bills?

How to Allow Negative Bill Amount Only for Credit Bills?

In this tutorial, we will cover a special configuration that allows saving a negative bill amount—only when the bill is in credit mode. This is especially useful in scenarios like product returns or exchanges where the customer is owed a balance.

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Understand the Default System Behavior

Let’s take a typical case:

• A customer returns or exchanges an item.

• The new item costs less than the original one.

• This results in a negative bill amount (e.g., ₹-320).

Default Restriction:

When you try to save this bill—whether in cash or credit mode—the system shows an error:

"Negative bill amount is not allowed."

This means you cannot proceed unless the bill total is zero or positive.

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Enable the Option for Credit Bills

To handle such return cases correctly, Logic ERP provides a setting to allow negative bills in credit mode only.

How to Enable:

• Open Logic Admin

• Go to Global Settings

• Navigate to Sales Settings - 1 Option

• Locate and enable the option labeled as "Allow -ve Bill Amount Only for Credit Bills"

• Save the settings and restart the software

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Implement the Behavior After Enabling

Let’s try the same return scenario again:

• Open the Sale Voucher screen

• Add the returned item

• Add the exchanged item (of lower value)

• Total becomes negative (e.g., ₹-513)

Case 1: Cash Mode

• Select Cash as the payment mode

• Try saving the bill

Result: System still restricts the entry Message: Payment Entry is More Than Bill Amount by Rs.:-513.00.

Case 2: Credit Mode

• Select Credit as the payment mode

• Save the bill

Result: Bill is saved successfully The amount will be treated as a credit note that the customer can use in future purchases.

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Use Case & Benefits

Scenario	Why It's Useful
Item exchanges with lower value	Allows smooth return without immediate cash refund
Retail returns	Enables issuing of store credit
Credit settlement	Makes it easier to track customer balances

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📝 Final Notes

• The setting ensures negative billing is restricted to controlled credit cases only.

• Always communicate with your accounting or audit team when enabling such options for clarity in reporting.