BY REQUEST - GREATEST HITS by BOYZONE has sold 3,248,288 copies in 33 countries. The album sold best in United Kingdom (1,800,000 copies), Germany (250,000 copies) and Netherlands (120,000 copies).
BY REQUEST - GREATEST HITS certifications and sales
| Country / region | Sales | Certification / source | Certification date / sales as of | |
 Australia |
70,000 | 1x Platinum | SEPTEMBER 1999 |
Australia Sales: 70,000
Certification / note: 1x Platinum
Certification Date / sales as of: SEPTEMBER 1999
|
 Belgium |
25,000 | 1x Gold |
Belgium Sales: 25,000
Certification / note: 1x Gold
Certification Date / sales as of:
|
|
 Canada |
50,000 | 1x Gold | 2000 |
Canada Sales: 50,000
Certification / note: 1x Gold
Certification Date / sales as of: 2000
|
 Germany |
250,000 | 1x Gold | 2000 |
Germany Sales: 250,000
Certification / note: 1x Gold
Certification Date / sales as of: 2000
|
 Ireland |
60,000 | 4x Platinum | 1999 |
Ireland Sales: 60,000
Certification / note: 4x Platinum
Certification Date / sales as of: 1999
|
 Korea |
23,288 | RIAK / Gaon charts |
Korea Sales: 23,288
Certification / note: RIAK / Gaon charts
Certification Date / sales as of:
|
|
 Netherlands |
120,000 | 1x Platinum + 1x Gold | 2000 / 2001 |
Netherlands Sales: 120,000
Certification / note: 1x Platinum + 1x Gold
Certification Date / sales as of: 2000 / 2001
|
 New Zealand |
105,000 | 7x Platinum |
New Zealand Sales: 105,000
Certification / note: 7x Platinum
Certification Date / sales as of:
|
|
 Norway |
100,000 | 2x Platinum | 1999 |
Norway Sales: 100,000
Certification / note: 2x Platinum
Certification Date / sales as of: 1999
|
 Sweden |
80,000 | 1x Platinum | 6 October, 1999 |
Sweden Sales: 80,000
Certification / note: 1x Platinum
Certification Date / sales as of: 6 October, 1999
|
 Switzerland |
25,000 | 1x Gold | 1999 |
Switzerland Sales: 25,000
Certification / note: 1x Gold
Certification Date / sales as of: 1999
|
 United Kingdom |
1,800,000 | 6x Platinum | 17 December, 1999 |
United Kingdom Sales: 1,800,000
Certification / note: 6x Platinum
Certification Date / sales as of: 17 December, 1999
|
 Europe (IFPI) |
3,000,000 | 3x Platinum | 1999 |
Europe (IFPI) Sales: 3,000,000
Certification / note: 3x Platinum
Certification Date / sales as of: 1999
|
| Total sales | 3,248,288 | (in 33 countries) |
Total
Sales: 3,248,288
(in 33 countries)
|
Year-end chart performance for BY REQUEST - GREATEST HITS
| Chart 1999 | Rank | Sales |
| Australian Albums (ARIA) |
50 | >70,000 |
 Austrian Albums (Ö3 Austria) |
45 | |
| Belgian Albums (Ultratop Flanders) |
9 | |
| Belgian Albums (Ultratop Wallonia) |
66 | |
 Danish Albums (Hitlisten) |
7 | |
| Dutch Albums (Album Top 100) |
13 | |
 European Albums (Music & Media) |
14 | |
| German Albums (Offizielle Top 100) |
37 | |
| New Zealand Albums (RMNZ) |
3 | |
| Swedish Albums (Sverigetopplistan) |
20 | 80,000 |
| UK Albums |
2 | 1,520,000 |
| Chart 2000 | Rank | Sales |
| UK Albums |
85 | 190,000 |