83f17e5c___International_Bulk_Mail_T_Cs__Actions
[No] 6.6.7 [Issue] Samples not submitted for verification and/or if the mail cannot be opened for inspection (either due to packaging or any other reasons) during lodgment. [Actions] 
The mail will be charged at the full published postage rate.
SingPost - International Bulk Mail T&Cs
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