IN CASE YOU DIDN'T KNOW by OLLY MURS has sold 1,135,000 copies in Europe (IFPI) and Ireland.
IN CASE YOU DIDN'T KNOW certifications and sales
| Country / region | Sales | Certification / source | Certification date / sales as of | |
 Ireland |
30,000 | 2x Platinum | 2011 |
Ireland Sales: 30,000
Certification / note: 2x Platinum
Certification Date / sales as of: 2011
|
 United Kingdom |
1,105,000 | 3x Platinum | 21 December, 2012 |
United Kingdom Sales: 1,105,000
Certification / note: 3x Platinum
Certification Date / sales as of: 21 December, 2012
|
 Europe (IFPI) |
1,000,000 | 1x Platinum | 2012 |
Europe (IFPI) Sales: 1,000,000
Certification / note: 1x Platinum
Certification Date / sales as of: 2012
|
| Total sales | 1,135,000 | (in 2 countries) |
Total
Sales: 1,135,000
(in 2 countries)
|
Year-end chart performance for IN CASE YOU DIDN'T KNOW
| Chart 2011 | Rank |
| Irish Albums (IRMA) |
20 |
| UK Albums (Charts Plus) |
12 |
| Chart 2012 | Rank |
| UK Albums (Charts Plus) |
20 |
| Chart 2013 | Rank |
| UK Albums (Charts Plus) |
81 |
Decade-end chart performance for IN CASE YOU DIDN'T KNOW
| Chart 2010's | Rank |
| UK Albums (Official Charts) |
36 |