Recently, tired of going to post office to certify some letters (i.e. Tax returns, Bills etc.), I developed this tool. Mostly for personal use. Just post here i

Recently, tired of going to post office to certify some letters (i.e. Tax returns, Bills etc.), I developed this tool. Mostly for personal use. Just post here in case someone interested. Usage: Print the barcode on the envelope, track it later with serial number.