My document type is not listed. Can you still help?

Usually yes. Send the document and the instruction from the authority that requested it. The chain of certification depends on who issued the document and who will receive it, not on a fixed catalogue, so unusual documents are assessed individually before a plan and a fee are proposed.

Do you handle electronic documents and e-signatures?

Where the receiving authority accepts them, yes. Thailand recognises electronic signatures under its electronic transactions legislation, but many foreign registries and embassies still require a wet-ink original with physical seals. The accepted format should be confirmed in writing before work begins.

What if the destination changes its requirements mid-process?

We re-check requirements close to the filing date for exactly that reason, and if they change we set out the revised steps and any additional cost before continuing. Documents already certified can often be reused in the new chain, which limits the impact.

NYC Legal & Notary Public attorney team, Bangkok — Wat Arun riverside

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Mr. Jiraphan·Notarial Services Attorney
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Mr. Jiraphan — Notarial Services Attorney certificate, Lawyers Council of Thailand — Mr. Jiraphan·Notarial Services Attorney

Mr. Jirasak — Notarial Services Attorney certificate, Lawyers Council of Thailand — Mr. Jirasak·Notarial Services Attorney

Mr. Patipan — Notarial Services Attorney certificate, Lawyers Council of Thailand — Mr. Patipan·Notarial Services Attorney

Mr. Warawut — Notarial Services Attorney certificate, Lawyers Council of Thailand — Mr. Warawut·Notarial Services Attorney

Mr. Wiwat — Notarial Services Attorney certificate, Lawyers Council of Thailand — Mr. Wiwat·Notarial Services Attorney

Miss Anutree — Notarial Services Attorney certificate, Lawyers Council of Thailand — Miss Anutree·Notarial Services Attorney

Checklist for switching accounting firms without losing records

The usual damage after changing bookkeepers is mismatched opening balances, missing original documents and lost access to e-filing accounts. This checklist focuses on what you must obtain before the move is final.

Quick answer

Before moving, recover all original documents, the latest trial balance and financial statements, schedules supporting each balance, the fixed-asset register with accumulated depreciation, input and output VAT reports, past filing and payment evidence, and e-filing access held in the company's own name. Then reconcile everything against the ledgers before the new period starts.

0 of 13 items ticked

1. Records and data to recover

All original documents: input and output tax invoices, receipts, contracts and bank records
The trial balance and the signed audited financial statements for the latest year
Schedules behind each balance: receivables, payables, inventory and director loans
The fixed-asset register with acquisition dates, useful lives and accumulated depreciation
Accounting software data in a readable export format, not only images

2. System access and filing history

Reset e-filing passwords so the company itself controls them
Verify that social security and financial-statement submission accounts still work
Collect filing confirmations and tax payment receipts covering at least the statutory retention period
Check for unfiled or amended returns and any unanswered letters from the authorities

3. Transition and starting the new period

Pick a cut-off aligned with a tax period so one month's returns are not split between two firms
Reconcile bank, receivables, payables and tax payable at the cut-off date
Confirm who updates the registered bookkeeper in the relevant systems
Agree the new scope in writing: monthly work, annual work and representation before the authorities

The mistakes we see most often

Moving mid-year without reconciling, so opening balances fail at year-end close
Receiving only images instead of the original documents needed for audit trails
Leaving e-filing credentials in the previous provider's hands
Not checking for unfiled returns and discovering penalties after the move
Taking a fixed-asset register with no accumulated depreciation, which breaks next year's depreciation

Frequently asked questions

When is the best time to change accounting firms?

The cleanest point is after the annual close and tax filing, because the audited statements give a firm starting balance. If a mid-year move is unavoidable, cut off at the end of a tax month and reconcile fully first.

What if the previous firm will not return the documents?

Start with a written demand listing the items and a deadline. If it is ignored, have a lawyer assess your contractual and legal rights, since the original accounting records belong to the client company.

How long must accounting records be kept?

Accounting and tax law each set retention periods, and an assessment can arrive at any point within them, so keep both the originals and backups in separate locations.

What if we find an error in a prior-year filing?

Assess materiality first, then consider an amended return with the tax and surcharge the law requires. Correcting voluntarily before an audit notice is usually simpler to manage.

How are fees calculated?

Fees are quoted case by case based on complexity and document volume, and confirmed in writing before work starts.

Related services

Have our team review the file before you file

Send us the items you could not tick and we will tell you what is missing and the order that fits your case. Fees are quoted case by case based on complexity and document volume, and confirmed in writing before work starts.

083-249-4999 · LINE @NYC168 · Contact@nyclegal.co.th

This page is general preparation guidance, not case-specific legal advice, and may change with the responsible agencies' notifications. Last updated 20 September 2026.

Aspect	On your own	With NYC Legal
Uncertain requirements	Research yourself and risk relying on outdated information.	Requirements are verified with the relevant authority before work begins.
Multiple documents	The wrong order costs weeks.	Sequenced to finish in a single pass wherever possible.
Advice	No one to help weigh the options.	An advisor assesses the alternatives with you.

Option	What it is	Best for	Watch out for
Handle everything yourself	Research the rules, prepare the file and deal with each authority on your own.	Simple cases, when you have time and are located near the relevant offices.	Requirements change often; one missing document or a missed intake window restarts the cycle.
Outsource only part of the process	Hire help for the step you are stuck on, such as translation or a single filing.	People who already understand the process but face time or distance constraints.	If an early step is formatted wrongly, every later step fails with it.
Let us manage the full route (recommended)	Case assessment, route planning, preparation, translation, filing, follow-up and return delivery.	Anyone on a fixed deadline, living upcountry or abroad, who cannot afford a rejected file.	Share the destination requirements up front so we can plan the route correctly in one pass.