Royal Mail is offering special incentives to encourage marketers to mail 50,000+ incremental items for two separate sales-generating periods. Those interested in promoting their Black Friday discounts will need to apply by 15th November and process their mailings between 11th-30th November to qualify. Those preferring to focus on Christmas promotions have until 13th December to apply and must mail between 11th-27th December. Details of the discounts on offer are available from Royal Mail or via accredited mailing houses. The offer covers Mailmark Advertising Mail, Partially Addressed Letters and Large letters (up to 250g) with discounts paid via postage credits which will be valid for 12 months.