In almost all cases, yes. Where the change affects the particulars shown on the company affidavit — which it almost always does — the updated board resolution must be filed with the DBD and a revised affidavit obtained. A board resolution alone is an internal act: banks and government agencies will not act on the new arrangement until the affidavit reflects it.

Thai law allows considerable flexibility. Common arrangements include: a single named director signing alone; two or more specified directors signing jointly; any one director from a defined group signing alone; or director signature combined with the company seal. The arrangement is stated in the board resolution and reflected on the updated affidavit. UnionSPACE reviews the commercial and legal implications of each option before drafting.

Yes — a signing authority change is a standalone corporate act. The composition of the board of directors remains unchanged; only the signing rule on the affidavit is updated. A shareholder resolution is not required in most cases. This is one of the most efficient corporate secretarial changes available to Thai companies.

The new signing rule takes external legal effect once the DBD filing is processed and the revised affidavit is issued. Internally, the change takes effect from the date stated in the board resolution. Documents signed under the new arrangement before the affidavit is updated carry legal uncertainty — which is why we recommend beginning the process without delay once the decision is made.

No. The company affidavit and a bank mandate are separate instruments. An updated affidavit confirms the company's new signing authority as a matter of public record, but each bank must be separately notified and its internal mandate separately updated. Failure to do so creates a mismatch between what the affidavit shows and what the bank will act upon. We advise on the correct sequencing during the engagement.