[Troubilshow]

Yes, for the PC (which I don't have) I was going to fill a box with dry ice and send it directly with the return form that they provided me.

It's mostly for the weight because the pc weighs 5kg.

It's concerning.

Due to Its size, signs of tampering will most likely be noticed during Its early stages In transit. Moreover, you'd need to very accurately calculate the dry Ice sublimation time.

if there's a weight check during the package's journey.

There most certainly Is - when checked In at the carrier's depot, and just prior to dispatch. Shipment weights are calculated using a formula as per below.

• Dimensional Weight - self-explanatory, the package length, width and height
  
• Actual Weight - Item and Its packaging
  
• Billable Weight - the greater of the dimensional and actual weight
  

The cost of freight Is calculated thereafter.

Thank you for all this information it is very valuable! I was thinking of making small discreet notches so it would sublimate faster.

Also there are several sizes of dry ice distribution, I was thinking of taking a 5kg in 1 block directly but there are also small sticks, I think that the sticks sublimate perhaps faster than the block but make a noise of shock between them when the package moves. What would be your advice on this?

Otherwise I'll take the exact dimensions of a package from the pc in question.