I sent my documents in to your office by post: how do I know if they have arrived?
If you sent your documents by Royal Mail Special Delivery or by Recorded Delivery within the UK you should have a "track and trace" number. The Royal Mail offers the "track and trace" facility on its website which allows you to see if your envelope has been delivered to this office. However you will need the "Track & Trace" number.
Please see the Royal Mail Website for more details