Suspect Your Spouse Is Moving Money or Transferring Assets Before Divorce: How to Build an Asset and Money-Trail List Lawfully

You see the balance in the joint account falling in large steps. Your spouse starts saying "that plot of land is my sister's now," or the car that used to sit outside the house is gone. You have not filed for divorce, but you fear that by the time property is divided there will be nothing left to divide. The question is how to find out what has gone where without getting yourself into trouble.

This guide covers only building an asset and money-trail list before divorce, and the options a lawyer must assess. For the overall picture of divorce, marital property and custody, see the divorce, property division and custody guide. If the main asset is shares or a business, see company shares and business assets in a divorce.

Short Answer

You can do a great deal without touching the other spouse's accounts or devices at all. Gather documents that are yours or that you hold lawfully, build an asset list and timeline, and let a lawyer assess which route fits: cancelling the transfer, counting the transferred asset in the division, asking the court to separate the management of marital property, or seeking interim protection before judgment. Logging in to accounts, opening a phone, or installing tracking apps on a spouse's devices is something you should not do at all.

Legal basis (Civil and Commercial Code, Civil Procedure Code) Section 1476 lists certain acts on marital property that need the other spouse's consent, such as selling, exchanging, selling with right of redemption, mortgaging, leasing immovable property for more than three years, lending money, making gifts, and compromising a dispute. Section 1480 lets the other spouse ask the court to cancel an act made without that consent, within the time the law sets. Section 1534 counts marital property that was disposed of improperly back into the division under Section 1533. Section 1484 lets the court order that the petitioner manage marital property alone, or that marital property be separated, where the statutory grounds exist. Section 254 of the Civil Procedure Code allows interim protection before judgment, such as attaching property.

Our practical view These cases are won or lost on two points of proof: whether the asset was marital property, and when and why it was transferred. A tidy, document-backed asset list lets a lawyer decide quickly which route to take. Time matters, because an asset passed on to a third party is much harder to recover.

Hypothetical Napa and Thana are a married couple in Khon Kaen, married for 14 years. Napa notices that the joint savings, once around 1,500,000 baht, are down to less than a third, and Thana hints that a rice field bought during the marriage has been "given to my younger brother." Napa is tempted to ask their child, who once helped set up the banking app, for the password, but decides not to. She starts instead with the joint passbook she holds, a copy of the title deed in the family document cabinet, and messages Thana sent to her own phone, and takes these to a lawyer. All figures and events are invented for illustration.

1. What signs justify starting a record?

One sign is not enough to conclude assets are being hidden, but several together justify starting a list.

• Balances in accounts you know about fall in large steps without explanation
• Statements stop arriving at the house, or move to an email you cannot access
• Property is sold or mortgaged without your signature
• Property appears in the name of a relative, a friend, or a company your spouse is involved in
• Your spouse sends large sums to a third party, calling it a loan or a gift
• Gold, jewellery, or valuables kept at home go missing

Some of these have innocent explanations, such as repaying an old debt or investing in a family business, so record the facts first and do not accuse without evidence.

2. What does the law give you (Sections 1476, 1480, 1534, 1484)?

Acts that need consent (Section 1476) Each spouse can manage some marital property alone, but certain acts need the other's consent. They include selling, exchanging, selling with right of redemption, hire-purchase, mortgaging, releasing a mortgage or transferring mortgage rights over immovable property or registrable movables; creating, changing or ending burdens on immovable property; leasing immovable property for more than three years; lending money; gifts (except gifts suited to the family's station for charitable, social or moral-duty purposes); compromising a dispute; submitting a dispute to arbitration; and giving property as security to an official or the court. Anything outside the list can be done by one spouse alone, such as withdrawing deposits for ordinary spending, so you need to see which item the suspected act falls under.

Cancellation (Section 1480) If an act listed in Section 1476 was done without consent, the other spouse can ask the court to cancel it, but there is a time limit. As we read it, the request must be made within one year of learning of the grounds and no later than ten years from the act, and a third party who acted in good faith and gave value may be protected. A lawyer will check the current text before counting time for you. The key point is "from learning": note the date you found out and do not let time pass.

Counting the transferred asset in the division (Section 1534) Even if cancellation is not possible, for example because the asset is now with a good-faith third party, the law treats marital property as still existing if it was disposed of for that spouse's personal benefit, to harm the other spouse, without the consent the law requires, or was wilfully destroyed. It is then counted in the equal division under Section 1533. If the other spouse receives less than their share, the disposing spouse must make up the shortfall from their own share or separate property. You must show the asset was once marital property and that one of those grounds applies. If the other spouse says the asset was really sold to pay family debts, the person making that claim needs evidence for it.

Asking the court to separate management (Section 1484) If the spouse with the power to manage marital property causes serious damage, fails to support the other spouse, is insolvent or has debts above half the value of the marital property, obstructs the other spouse's management without reasonable cause, or acts in a way likely to ruin the property, the other spouse can ask the court to let them manage marital property alone, or to separate it. They can also ask for temporary protective measures over management. Unlike a divorce suit, this works while the marriage continues.

One caution: separate property is not marital property. A transfer of the other spouse's separate property is not caught by these rules, and a prenuptial agreement may provide otherwise. See what to agree in a prenuptial agreement.

3. How do you find information lawfully, and what must you not do?

Lawful sources

• Your own documents, such as your passbooks, joint account statements on which you are an account holder, tax invoices, and sale contracts
• Copies of documents already in the home or in your possession, such as title deeds, vehicle registration books, policies, and annual tax records
• Messages, emails, or slips sent directly to you, or that you received yourself
• Public company data at the Department of Business Development, such as directors, shareholders and financial statements
• Land records at the land office, in the cases and by the methods the law permits, with a lawyer or interested party filing the request; the officer will tell you how much can be disclosed
• During proceedings, the court can order banks or agencies to produce documents when a party applies and the court considers it appropriate, which is the proper channel when you need the other spouse's account records

What not to do

• Do not log in to your spouse's bank, email, social media or LINE accounts, even if you know the password or once shared it
• Do not unlock the other spouse's phone or computer to view or copy data without their permission
• Do not install location trackers, message-interception apps, or spyware on their devices
• Do not trick anyone into giving an OTP, or ask someone else to access an account for you

The Computer Crime Act B.E. 2550 (2007), Section 5, makes it an offence to access a protected computer system without the right to do so; Section 6 deals with disclosing access-prevention measures one has learned; and Section 7 deals with accessing protected computer data without the right. The Personal Data Protection Act B.E. 2562 (2019) may also apply where another person's data is collected, used or disclosed without a lawful basis. Collection for purely personal or household use may be partly exempt, but data obtained through unlawful access and then published or filed in court is not something to rely on that exemption for.

The consequences cut both ways. You may be reported to the police or sued for damages, and evidence obtained unlawfully can be challenged or given little weight by the court, weakening a case you would otherwise win.

What to do instead If you believe money is moving abnormally, note what you can see from documents you hold lawfully, identify which accounts you need information on, and let your lawyer assess asking the court for a subpoena or order. You may also ask your spouse directly and keep the answer in writing, or request an explanation through counsel.

4. Table: asset type, lawful source, and what a lawyer may ask the court for

What a lawyer can actually obtain depends on the case, the evidence and the court's discretion. This table is a guide, not a promise that the court will allow every item.

5. Sample asset and money-trail list

Keep it in one file or notebook. Write only what you know from documents, and separate "facts with documents" from "suspicions."

Asset and money-trail list (prepared by: Napa  Date prepared: ____)

A. Assets that exist (state whether acquired before or during marriage)
1. Land, title deed no. ____ Tambon ____ Amphoe ____ Khon Kaen
   Registered owner: ____  Acquired on: ____ (during marriage)
   Document: copy of title deed pp. 1-2 (kept at: ____)
2. Joint bank account, ____ Bank, last digits ____
   Latest balance shown in a document: ____ baht as of ____
3. Car, make ____ plate ____ name in registration book: ____

B. Unusual events (in date order)
Date ____ | ____ baht left the joint account | Destination per statement: ____
          | Evidence: statement page ____ | Suspicion: no reason known
Date ____ | Spouse said "that rice field has been given to my brother"
          | Evidence: LINE message sent to me (screenshot from my own phone)

C. Date I learned of it (used to count the time limit under Section 1480)
First learned on: ____ Learned from: ____

D. What I do not know, and want the lawyer to assess how to find out
- Whose account received the amount on ____
- Whether that rice field has been formally transferred yet

E. Documents attached: ____

6. When must you act fast, and what options does a lawyer weigh?

See a lawyer at once if any of these applies.

• You learn that a house or land has been sold, mortgaged or given away, because the Section 1480 time limit has started and the asset may be passed on
• Large sums are being withdrawn or transferred repeatedly
• Your spouse says they will move abroad or is preparing to sell assets
• Your spouse starts pressing you to sign documents you do not understand, which may be a consent under Section 1476

Options a lawyer assesses

1. File for divorce with division of marital property, asking that disposed assets be counted (Sections 1533, 1534), suited to when you have decided to divorce.
2. Sue to cancel the act (Section 1480), suited to when the asset can still be traced and you are within the time limit.
3. Petition the court to let you manage marital property alone or to separate it (Section 1484), suited to when you do not yet want a divorce but must stop the damage.
4. Seek interim protection before judgment, such as attachment (Civil Procedure Code Section 254), suited to when there is reason to believe assets will be transferred or hidden. The court usually requires security, and there must be evidence, not just suspicion.
5. Negotiate. In some cases, negotiation by lawyers armed with a clear asset list leads to a faster settlement with less damage.

Each option has different costs and risks; for example, attaching assets without proper grounds can lead to liability. A lawyer will choose based on your facts and evidence. For the children's side, see maintenance and custody. If your spouse is a foreign national, see divorce involving a foreigner in Thailand.

7. Checklist before you see a lawyer

Documents to prepare

• Marriage certificate, your ID card and house registration
• Passbooks and past statements of accounts you own or co-own
• Copies of title deeds, vehicle registration books, policies and sale documents you already have
• The family's annual tax records
• Messages or emails sent directly to you, and screenshots from your own device

Information to note

• The asset list from Section 5
• The date you learned of each transfer
• The names of those who received assets and their relationship to your spouse
• Which assets are separate property (acquired before marriage, inherited or received as a gift), with proof

What not to do

• Do not log in to or open your spouse's accounts, phone or email
• Do not install tracking or message-interception apps
• Do not delete or hide your own assets in retaliation, because that becomes your problem
• Do not shame your spouse or relatives on social media
• Do not sign documents you do not understand before your lawyer has read them

Further Reading

• Divorce, property division and custody — the overall picture of divorce and how marital property is divided under Section 1533
• Company shares and business assets in a divorce — when the main asset sits inside a company
• A home still under mortgage in a divorce — assets that carry a mortgage
• What to agree in a prenuptial agreement — separate property and terms that change how assets are divided
• Maintenance and custody — the children's side of a divorce case
• Divorce involving a foreigner in Thailand — when your spouse is a foreign national
• Minority shareholder rights — when you are a shareholder in your spouse's company

You do not need to enter anyone's account to show that assets have gone missing. Build the list from documents you hold lawfully, note the date you found out, and let your lawyer use the court's powers to obtain the rest.

We help spouses who suspect money or assets are being moved to assess their options, build the asset list, and bring the case. For an initial consultation, call +66 92 254 2045 or send us the details. See also our family law practice and asset tracing service.

This guide is published by Suwanvara Law Firm — a Khon Kaen law firm established in 1986. General information only, not legal advice on a specific matter.