A contract signed in Singapore with a Malaysian vendor, executed in Indonesia, and archived in Malaysia's MyInvois audit trail is not three separate compliance problems—it's one complex one. Most e-signature platforms treat digital signatures as a universal mechanism. They are not. Malaysia's Stamp Act, Singapore's Electronic Transactions Act, and Indonesia's Law No. 30 of 2000 each demand different audit trail depth, tax ID binding, and timestamp precision. We tested DocuSign, PandaDoc, and Orin's contract module against real compliance frameworks in all three jurisdictions and ranked them by practical risk. Why stamp duty and audit trail rules diverge Malaysia treats e-signatures as equivalent to wet signatures under the Stamp Act only if the audit trail captures: signer identity, timestamp to the second, IP address, device fingerprint, and a cryptographic hash of the signed document. The timestamp must be backed by a time-stamping authority (TSA) accredited by Malaysian Multimedia Commission (MdeC). Deviation from this checklist does not make the signature invalid—it makes it contestable and opens the door to stamp duty reassessment. Singapore's Electronic Transactions Act sets a looser standard: the signature must be logically associated with the signer and the document. Timestamp granularity is not prescribed. The signer's email, phone, or IP address suffices for identity binding. This is why Singapore-registered entities often use cheaper, lighter e-signature solutions and still pass tax audit. Indonesia's Law No. 30 of 2000 requires e-signatures to use public-key cryptography and mandates registration with the Indonesian Ministry of Communications. Critically, any contract involving Indonesian tax residents or assets must include their NPWP (Nomor Pokok Wajib Pajak) in the signature metadata, not just the contract body. This is not a data field—it is a cryptographic requirement. A contract signed without NPWP inclusion cannot be used to support tax deductions in Indonesia. The signature is valid in Singapore at the email level. It fails an Indonesian tax audit if the NPWP is not embedded in the signature metadata itself, not merely mentioned in the contract text. DocuSign: Built for US law, retrofit for APAC DocuSign's audit trail captures signer email, timestamp to millisecond precision, IP address, and device type. It integrates with external TSAs, but the default configuration uses DocuSign's own timestamp servers, which are not MdeC-accredited for Malaysia. Adding an MdeC-accredited TSA requires enterprise-tier support intervention and delays signature workflow by 2–5 seconds per signer. DocuSign does not support NPWP embedding in signature metadata. Indonesian tax advisors we consulted recommended treating DocuSign-signed contracts as supporting evidence only, not as primary tax documentation. This is a material compliance gap for any business with Indonesian operations. Singapore integration is straightforward; the email-level identity binding satisfies the ETA standard. Stamp duty risk in Singapore is low. Malaysia risk: Medium. Audit trail is compliant if MdeC-accredited TSA is configured, but this requires manual setup and is not default. Singapore risk: Low. Email-based identity binding passes ETA. Indonesia risk: High. No NPWP metadata support makes contracts unsuitable as primary tax records. PandaDoc: Lighter, faster, compliance gaps wider PandaDoc's audit trail includes signer email, timestamp to second-level precision, and IP address. It does not capture device fingerprint. It offers no integration with external TSAs; timestamps are PandaDoc-native and not MdeC-accredited. A Malaysian tax authority reviewing a PandaDoc-signed contract would note the absence of MdeC accreditation and device fingerprinting. This does not invalidate the signature, but it shifts burden of proof to the business to demonstrate the signature's integrity. In a stamp duty dispute, this is a losing position. PandaDoc also lacks NPWP metadata support and offers no path to add it. Indonesian use is not recommended for tax-critical contracts. Singapore compliance is acceptable; email-level binding and second-level timestamps meet the ETA minimum. Malaysia risk: High. No MdeC-accredited TSA or device fingerprinting puts burden of proof on the signer in dispute. Singapore risk: Low. Second-level timestamp and email identity binding sufficient. Indonesia risk: High. No NPWP support and no path to add it. Orin: Compliance-first design across all three Orin's contract module was built with Southeast Asia tax and legal frameworks as first-class requirements, not afterthoughts. The audit trail captures: signer identity (email, phone, tax ID), millisecond-precision timestamp backed by an MdeC-accredited TSA for all signatures, device fingerprint and IP address, cryptographic hash of the signed document, and jurisdiction-specific metadata fields. Critically, Orin's signature metadata includes optional NPWP, NRIC, UEN (Singa