What happens if the carrier charges a surcharge for weight or size?
Updated October 24, 2026
If the parcel is bigger or weighs more than you declared, the carrier may charge a surcharge. Colectin may charge it to the seller and it is deducted from the sale amount.
The weight you choose
When you prepare the shipment you choose a weight range: Up to 1 kg, 1 to 2, 2 to 3, 3 to 5, 5 to 10, 10 to 15, 15 to 20, 20 to 30 or More than 30 kg. Colectin takes care of the box size. A wrong value can cause a carrier surcharge.
The parcel size
The size is optional. If you fill it in, the price uses the volumetric weight when it is higher than the chosen weight (Correos calculates 6,000 cm³ per kg). If you leave it empty and the parcel is bigger than usual for its weight, the carrier may add a surcharge and Colectin may charge it to the seller.
With Correos, the longest side can measure up to 120 cm on national shipments and 105 cm on international ones. The girth can reach 210 cm on national shipments and 200 cm on international ones.
How the surcharge is charged
The surcharge is issued on a separate invoice to the seller, with their country's taxes. If you do not pay it, it stays as a debt in the wallet under the name Shipping correction owed, and it is deducted from your next sale if you do not pay it before. You can also pay it at the time with Pay now.
Read shipping settings, shipping modes and how to print and hand over the label.