Here is the link to email Monarch with your queries, they will reply but it may take a few days.
Would you kindly post their reply as I would be interested to know, their website faqs are not very clear.
http://www.monarch.co.uk/faq/holidays/contact-us/email-us
This may help:
When will I receive my tickets?
Full details of your holiday will be dispatched to you approx 7 to 10 working days before departure. If you have not received these within 5 working days of your departure, please call us on 0871 423 8503 (Calls to this number cost 10 pence per minute from a standard BT landline. Calls from other networks and mobiles may vary), selecting the option for existing customers.
It is vital that you check the information on your travel documentation to ensure everything is correct. Flight details are subject to change at any point so it is vital that you check your departure time, airport and terminal. Also, the names on your ticket must be your passport names.