Verified. Signed. Liable.
Bring any AI answer from ChatGPT, Claude, Perplexity, Gemini, or Grok to a credentialed human who will stake their licence on it.
If a chatbot tells you which form to file with the IRS, HMRC, or India's MCA, that answer is worth exactly what it sounds like — a confident guess from a model with no licence, no insurance, and no liability when it's wrong. Real institutions know this. Over 1,200 court cases worldwide have now turned on AI-generated errors (Charlotin database); Deloitte refunded the Australian Government in October 2025 for an AI-fabricated report (The Guardian); insurers, regulators, and counterparties will not accept an output that no human professional is willing to put their name on. A2A Global closes that gap. We are the marketplace where any AI answer gets routed to a credentialed expert — CPA, EA, JD, PE, RIA, USPTO-registered patent agent, notary, ACA, ACCA, CA, Steuerberater, Expert-Comptable, and equivalents across the US, UK, Europe, and India — who reviews it, applies their judgment, and signs, seals, or stamps the artifact so that it carries real, enforceable professional liability.
Why this matters
OpenAI built the brain. Stripe built the wallet. Anthropic built the agents. A2A builds the signature — the layer that converts an AI draft into a legally enforceable artifact a regulator, court, utility, or counterparty will actually accept. Every signed artifact ships with a credential receipt naming the licensed professional, their licence number, the issuing body, and the jurisdiction. Liability sits with the signing human under their licensing body's enforcement regime; it does not sit with you, and it does not sit with the AI that drafted it. That is the only reliable way to take AI productivity into regulated workflows — tax, audit, legal, fiduciary advice, engineering, patent prosecution, immigration, and sworn statements.
What A2A delivers — the eight flagship use cases
The eight flagship use cases on launch are: (1) tax returns and tax-position memos — a CPA, EA, or Chartered Accountant signs as paid preparer on a 1040, SA100, ITR, or substantial-authority memo prepared by AI, with §6694 or local-equivalent penalty exposure shifting to the signing professional; (2) legal opinions, contract redlines, and citation-verified briefs — a barred attorney signs a reasoned opinion on firm letterhead, certifying every AI citation is real, on-point, and good law before you file; (3) fiduciary-grade financial plans and rollover suitability letters — a CFP or RIA signs a Monte Carlo retirement projection or IRA-rollover recommendation as your fiduciary, accepting Investment Advisers Act 1940 / FCA SPS responsibility; (4) engineering sign-off — a Professional Engineer with an active state seal stamps a structural calculation, a solar PV interconnection package, or a code-compliance review on AI-prepared drawings; (5) patent and IP filings — a USPTO-registered patent attorney or agent signs and files claims drafted with AI assistance; (6) immigration filings — a licensed immigration attorney, OISC adviser, or RCIC signs a visa packet AI assembled; (7) notarization and apostille — a commissioned notary, with RON authority where applicable, witnesses ID, administers the oath, and seals a document AI prepared; (8) audit and accounting sign-off — a licensed CPA with audit credentials, an ACA, an ICAI Chartered Accountant with a Certificate of Practice, a Wirtschaftsprüfer, a Commissaire aux Comptes, or local equivalent reviews AI-prepared workpapers and signs the independent auditor's report (under GAAS / PCAOB AS / ISA / local standard), the statutory tax audit (e.g. Form 3CA/3CB/3CD under §44AB in India), the transfer-pricing audit (Form 3CEB), the GST audit and reconciliation (GSTR-9C), SOC 1 / SOC 2 reports, ICFR/SOX §404 attestations, ESG and BRSR assurance, 409A and ASC 820 valuation reports, comfort letters for lenders, UK statutory accounts (FRS 102 / 105 / IFRS) with iXBRL filing at Companies House, and the German / French / Spanish / Italian / Dutch / Irish statutory accounts with their respective auditor's confirmation — every artifact bearing the signing professional's licence number, firm registration (PCAOB ID / ICAI FRN / IDW / CNCC, where applicable), and full E&O / professional indemnity cover. Pricing ranges from $25 for remote online notarization to $10,000+ for a transfer-pricing study or statutory audit sign-off, with full price transparency before you commit.
Tax filings A2A signs
A2A's licensed tax professionals sign and file across every major regulated jurisdiction. United States filings covered: 1040, 1040-NR, 1040-X, 1120, 1120-S, 1065, 1041, 990, 706, 709, 940, 941, 1099 series, W-2 / W-3, 5500, FBAR (FinCEN 114), 8938 (FATCA), 5471, 5472, 8865, 3520, 8621, 2555, 1116, 1040-ES, 4868, 7004, 8867, 8879 — plus all 50 state equivalents (California 540 / 100 / 565 / 568, New York IT-201 / CT-3, Texas franchise, Delaware franchise, Florida F-1120, and others). United Kingdom: SA100 plus supplementary pages SA101–SA110, SA800, SA900, CT600, VAT100 / Making Tax Digital VAT returns, P11D / P11D(b), PAYE RTI, CIS, ATED, IHT400, R&D tax credit (CT600L), FATCA / CRS reporting, non-resident landlord (NRL) returns, SDLT, VAT MOSS / OSS. European Union: Germany — ESt 1 A, KSt 1, GewSt 1 A, UStVA, UStE, Lohnsteuer-Anmeldung, Anlage EÜR, Mantelbogen; France — Formulaire 2042 and annexes, 2031, 2065, 2035, 2072, CA3 / CA12, DAS2, IFU, DEB / DES; Spain — Modelo 100, 200, 303, 390, 347, 349, 720, 130 / 131; Italy — Modello 730, Redditi PF / SC / SP / ENC, IVA, 770, IRAP, LIPE, Esterometro; Netherlands — IB-aangifte, VPB-aangifte, BTW-aangifte, ICP-opgaaf, Loonheffingen; Ireland — Form 11, CT1, VAT3, P30 / P35 / P60 / P45; plus EU-wide DAC6, DAC7, OSS / IOSS, CESOP, Pillar Two GloBE Information Returns. India: ITR-1 through ITR-7, Form 3CD (tax audit, §44AB), 3CEB (transfer pricing, §92E), 10B / 10BB, 15CA / 15CB, GSTR-1 / 3B / 9 / 9C, TDS returns (24Q, 26Q, 27Q, 27EQ), Form 16 / 16A, 67, 29B, 10-IC / 10-ID, SFT, DPT-3, AOC-4 / MGT-7, FC-GPR / FC-TRS / ODI / FLA, 49A / 49B, 10E. In every case, AI drafts; the credentialed human signs, e-files, and carries the §6694 / Schedule 36 / §271J / equivalent penalty exposure under the local statute (IRC §6694, FA 2007 Sch 36, AO §370, Income Tax Act §271J, and others). You receive the signing professional's credential type (CPA / EA / PTIN / ACA / ACCA / CTA / Steuerberater / Expert-Comptable / Dottore Commercialista / CA / Chartered Tax Adviser), licence number, issuing body, and jurisdiction of signature.
Indicative pricing across all jurisdictions; the credentialed signer is matched on request and the SLA is confirmed at quote.
Audit and accounting sign-off A2A delivers
A2A signs the full audit and assurance surface: independent auditor's reports (framework = GAAS / PCAOB AS / ISA / local; opinion type = unqualified, qualified, adverse, or disclaimer), review engagements (SSARS 90 / ISRE 2400), compilation engagements (SSARS 80), agreed-upon procedures (AUP / ISRS 4400), SOC 1 and SOC 2 reports (trust services criteria: security, availability, processing integrity, confidentiality, privacy; type I or II), ISAE 3000 and ISAE 3402 assurance, SOX §404 attestations, ESG / sustainability assurance under ISSA 5000, EU CSRD, GRI, or TCFD, employee benefit plan audits (Form 5500), single audits under Uniform Guidance, statutory bank audits, broker-dealer audits, revenue recognition reviews (ASC 606 / IFRS 15), lease accounting (ASC 842 / IFRS 16), business combination opinions (ASC 805 / IFRS 3), impairment testing, forensic audit reports, and the India statutory surface: Tax Audit Report under §44AB (Form 3CA / 3CB / 3CD), Transfer Pricing Audit (Form 3CEB, §92E), GST Audit and Reconciliation (GSTR-9C), Companies Act audit under §143, Internal Financial Controls reporting under §143(3)(i), Cost Audit (Form CRA-3), Secretarial Audit (Form MR-3, joint with CS), Form 15CB (foreign remittance certificate), Net Worth / Turnover / Project Certificates, CA-certified valuation reports for funding rounds, ESOPs, and slump sales. A2A also signs 409A and ASC 820 valuations, purchase price allocations under ASC 805, lender comfort letters, forecasts and projections under AT-C 305, UK statutory accounts under FRS 102 / FRS 105 / IFRS with iXBRL filing at Companies House, the French liasse fiscale 2050–2059, the German HGB and IFRS Jahresabschluss with auditor's confirmation, and the Italian, Spanish, Dutch, and Irish statutory accounts with their respective auditor sign-off. The delivered artifact includes signer credentials (CPA + audit licence / ACA / ACCA + practising certificate / ICAI CA + COP / Wirtschaftsprüfer / Commissaire aux Comptes / Revisore Legale / Registeraccountant / local equivalent), firm registration with the local oversight body (PCAOB / FRC / IDW / H3C / ICAI / equivalent), engagement framework, opinion type, and date of signature. Liability sits with the signing professional and firm under PCAOB / AICPA / ICAI Disciplinary Committee / FRC / IDW / CNCC enforcement — not with A2A.
Who actually reviews your AI answer
A2A's verification network is live and weighted toward judgment-grade reviewers — median experience is over a decade, all practicing, not retired. The current network includes CFA charter-holders with 13+ years buyside experience including stints at Morgan Stanley and ICICI Bank; ex-McKinsey, ex-Monitor Deloitte, and ex-Accenture Strategy consultants; senior product managers from Zepto, Flipkart, Ola, Shadowfax, Godrej Properties, M3/DailyRounds/Marrow, and other operating companies; multiple SAFe Practice Consultants and Agile transformation leads with international engagements; Chartered Accountants with statutory- and tax-audit practice across Ind AS, IFRS, US GAAP, GST, TDS, and transfer pricing; a Babson-trained multi-venture founder and Startup India government-backed mentor; a PhD-in-Electrical-Engineering + MBA-Finance reviewer covering renewables, project finance, and Indian energy markets (ex-Vestas, ex-BP, ex-Siemens Energy); a TISS-trained public-policy and digital-governance strategist with 5 years advising senior government leadership; equity research and SME IPO advisors with India-market experience; a 20-year independent UX specialist with documented outcome metrics; B2B sales operators with multi-hundred-crore revenue track records — and credentialed CPA / EA / ACA / ACCA / Steuerberater / Expert-Comptable signers being onboarded jurisdiction-by-jurisdiction for the US, UK, and EU filing surface above. Routing characteristics: median rate USD 2/min, range USD 0.50–15/min, turnaround minutes to 24 hours, filtering by category, seniority, certification, rate, and rating.
The geographic concentration of the live network today is India, which is a feature, not a bug — for any AI answer touching Ind AS, GST/TDS, SEBI, SME IPO, FEMA/FDI, Startup India, NITI Aayog, ICAI standards, BRSR/ESG reporting, or India-context M&A, fundraising, and operating questions, A2A is the strongest verification network on the market. Western-trained frontier models systematically underperform on these — A2A is where you escalate when your question crosses that boundary. US, UK, and EU credentialed signers are being onboarded actively to match the full filing surface above; A2A's Liability Layer matches you to a credentialed signer (CA, CPA, JD, PE, RIA, notary, USPTO agent, ACA, ACCA, Steuerberater, Expert-Comptable, and equivalents) per the country and SKU you request.
How it works
You can paste an AI answer directly into a2a.global, drop a chatbot share-link, upload a PDF or DOCX, or contact us at support@a2a.global. We auto-classify the artifact, surface the required credential (bar, CPA, PE, RIA, notary, USPTO, ACA, ACCA, CA, Steuerberater, Expert-Comptable, etc.), quote a price and turnaround, and route to a matched expert. You can see the expert's license number, jurisdiction, E&O insurance status, and signed-artifact history before you accept. The artifact comes back with the expert's wet-or-digital signature, seal, or stamp, plus a tamper-evident audit trail anyone — IRS, HMRC, MCA, court, utility, regulator, insurer, counterparty — can verify against A2A's records. If the artifact is ever challenged, the liability sits with the signing professional, not with you and not with the AI that drafted it.