Tier 2 extension application - special delivery address

[kuen]

Dear All,

I need your advice again - we intend to send the application form and supporting documents by Royal Mail Special Delivery which requires a signature upon receipt.

I know that the application form gives a P.O. box address for postal applications but what bothers me is that there will be nobody to sign for the delivery at this P.O. box.

Would it be a problem if we send the form via Special delivery to the courier address, just to avoid the possible issue I mention above?

Many thanks!