If a letter is polywrapped, what surcharge is applied?

When a letter is polywrapped, it typically does not conform to the standard dimensions or characteristics required for machine processing. The non-machinable surcharge is applied to items that cannot be processed through automated sorting equipment due to their shape, size, or packaging material. Polywrapped letters, which are often thicker or have an irregular shape compared to standard letters, necessitate a manual handling process, therefore incurring this surcharge.

In contrast, the other options do not relate directly to the specific conditions of polywrapped letters. The standard surcharge would apply to regular mail, while oversized pertains to items exceeding certain dimensions. Priority pricing is related to a specific service level rather than the handling characteristics of polywrapped items. Thus, the non-machinable surcharge most accurately reflects the additional handling required for polywrapped letters.