An internal cancellation note does not establish who knows
When someone has authority to act on your behalf and you want that role to end, review the power of attorney, agency agreement and unfinished work. Marking your own copy “cancelled” is not enough to establish notice. Identify when the agent learned of termination, which third parties are dealing with the agent and which acts were already completed.
This concerns ending previously granted authority, rather than checking whether a signatory originally had authority. A new revocation does not automatically undo earlier legal acts. Replacing a contact in a chat group should not substitute for reviewing the legal effect of the relevant documents.
Revocation rights come with qualifications
Section 827 of Thailand’s Civil and Commercial Code permits a principal to revoke agency and an agent to resign. Doing so at an inconvenient time for the other party can entail liability for resulting damage, except where unavoidable necessity applies. Timing, pending work and necessity therefore matter; the right to terminate does not mean that termination can never create liability.
Section 830 restricts reliance on termination against the other agency party until notice or knowledge. Section 831 protects third parties acting in good faith, except where their lack of knowledge results from their own negligence. Section 832 allows the principal to demand return of the power of attorney. The agent’s knowledge and the third party’s position both matter, not merely the date printed on a revocation letter.
Build the notice plan from the actual mandate
Collect each authority document, identifying issue date, scope, agent and recipients of copies. Classify work as completed, in progress or not started. Where a bank, public office or counterparty is already involved, check its notice procedure and document requirements. Sending one letter to the agent does not mean every external system immediately updates its records.
A notice should identify the authority document, whether revocation is full or partial, who gives notice and which pending materials or tasks require return or handover. Have the wording and delivery method reviewed for the circumstances. Preserve the sent version, delivery evidence and replies. If delivery fails or is refused, record that fact and seek advice instead of altering dates or creating retrospective evidence.
Separate notice, document return and earlier transactions
Hypothetical example: a principal notifies the agent of revocation, but a counterparty that previously received the authority document is still awaiting signature. Requesting the original back does not establish whether that counterparty knew or should have known. Provide the timeline and communications to a lawyer rather than declaring all later signatures either invalid or necessarily binding.
Before consulting B Law Firm, prepare the original authority, related agreements, pending work and notice evidence organized by recipient. Flag any imminent transaction appointment so that suitable risk controls can be considered. This is a general explanation of agency law, not a substitute for agency-specific procedures or advice on the validity of an individual transaction.
References
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