Section 58 — Activation of suspended punishment on reoffending
English translation
When it appears to the Court that, within the time fixed by the Court under Section 56, the person on whom judgment was passed has committed an offence which is not an offence committed through negligence or a petty offence, and the Court passes a sentence of imprisonment for that offence, the Court trying the later case shall also determine the punishment that was reserved from determination, or activate the punishment the execution of which was suspended, in the earlier case, unless the sentence of imprisonment passed in the later case is itself a suspended sentence.
If, within the time fixed by the Court under Section 56, the person on whom judgment was passed has not committed such an offence, that person shall be discharged from the punishment fixed or the punishment the execution of which was suspended.
This English translation is provided for reference only and has not yet been firm-verified — always rely on the Thai original.
Firm annotation
Section 58 sits in Book 1 under Punishments and Measures of Safety and completes the suspended-sentence regime begun in Section 56. It fixes the consequence of breaching probation: a qualifying reoffence within the period set by the earlier court triggers determination of the punishment that was left undetermined, or execution of the punishment whose execution was suspended, in addition to the new sentence. Offences committed through negligence and petty offences do not count, and no activation occurs where the imprisonment in the later case is itself suspended. Completing the fixed period without a qualifying offence discharges the reserved punishment entirely.
Why this matters in practice
For anyone under a suspended sentence, Section 58 is the reason a fresh conviction during the probation period can revive the earlier prison term on top of the new one. Only an intentional, non-petty offence that results in an actual, non-suspended term of imprisonment triggers it, so the exposure turns on the nature of the new offence rather than on any fresh application by the prosecutor. Serving out the full period fixed under Section 56 with a clean record wipes out the reserved punishment. Anyone facing a second charge while on a suspended sentence should take early advice from a Thai lawyer on the combined exposure.
Frequently asked questions
Does a negligence or traffic conviction activate my suspended sentence?
No. Section 58 excludes offences committed through negligence and petty offences; only an intentional, non-petty offence punished with imprisonment can activate the earlier suspended punishment.
What happens if I complete the probation period without reoffending?
Under Section 58, if you commit no qualifying offence within the time fixed under Section 56, you are discharged from the punishment that was reserved or suspended.
Is the suspended punishment still avoided if the new sentence is also suspended?
Yes. Section 58 does not activate the earlier punishment where the imprisonment imposed in the later case is itself a suspended sentence.