can track your mails if there's a tracking number sticker stub w/ bar code) on it. Or perhaps you may check their website that list down all 'waiting parcels/mails for pick-up'. Unless you have it (bar code) you still can find it, or unfortunately it was returned to sender because it has no P.O. Box No.

"I do live by the motto that pessimists are usually right, but all the great change in history was done by optimists" -Thomas Friedman