14 September 2026

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Disbursements

• Added test account statuses support for bank accounts and mobile wallets to aid in testing possible outcomes for disbursement (payout) transactions.

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Webhook Engine

• Fixed a bug for computation of webhook payload which introduced mismatches at client-side verification process.

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Hosted Checkout Service

• Added webhook headers support for callback-url to enable the merchant system to verify the webhook payload.
• Webhook delivery retry period will expire in 15 minutes matching with the checkout session period.

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C# SDK

These changes are available in OneKhusa.SDK 2026.3.3.0 version.

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Merchants

• Added Get Merchants SDK method documentation with new properties: revenueAmount, categoryCode, categoryName, classificationCode, classificationName, postalAddress, collectionFeeRuleCode, collectionFeeRuleName, disbursementFeeRuleCode and disbursementFeeRuleName.
• Added Get Classifications SDK method documentation to retrieve merchant classifications.
• Added Get Categories SDK method documentation to retrieve merchant categories.

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Test Your Integration

• Added Simulate Custom Payment for simulating a customer payment without a Request to Pay timed account number.
• Added Simulate Disbursement Reversal for simulating reversal of a previously successful single disbursement.
• Added Simulate Payment Reversal for simulating reversal of a previously successful collection payment.

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Webhooks

• Updated Verify Webhooks SDK method documentation to use HMAC-SHA512 algorithm for webhook payload verification.

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Bill Payments

• Added Pay Bill SDK method documentation for paying bills i.e. utilities.

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Constants

• Added Constants SDK method documentation to avoid developers hard-coding static values which is prone to errors.

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Single Disbursements Reorganisation

Single disbursement models are split by variant. Method names on client.Transactions.SingleDisbursements are unchanged. Banks and Mobile Wallets — Standard single payouts to bank accounts and mobile wallets. The following methods have been reorganised to this section:

• Create Payout
• Approve Payout
• Review Payout
• Reject Payout

Intra-Organisation — Transfers between accounts within the same organisation. The following methods have been added:

• Add Intra-Transfer
• Review Intra-Transfer
• Approve Intra-Transfer
• Reject Intra-Transfer

Inter-Organisation — Transfers between accounts across different organisations. The following methods have been added:

• Add Inter-Transfer
• Review Inter-Transfer
• Approve Inter-Transfer
• Reject Inter-Transfer

Transactions Inquiry — The following methods have been reorganised to this section:

• Get Payouts
• Get Payout

Breaking change — usings. Published docs previously imported OneKhusa.SDK.Models.Transactions.SingleDisbursements. Update as follows:

• Add Payout: use ...SingleDisbursements.BankOrWallet
• Approve/Review/Reject Payout: use ...SingleDisbursements.Shared
• Get Single Transaction / Get Single Disbursement Transactions: use ...SingleDisbursements.Shared