| Ufficiale |
|---|
| 1.1 | I.O.U | 3:49 | Freeez | Die Top-Hits aus Formel Eins | Various Artists | Album + Compilation | | EMI | 1C 088 1783281 |
| 1.1 | I.O.U. | ?:?? | Freeez | Let's Dance | Various Artists | Album + Compilation | | Arcade | ADEHC 122 |
| 2.8 | I.O.U. | 3:48 | Freeez | The Original Disco Dance Collection, Vol. 2: 1980–1984 | Various Artists | Album + Compilation | | EVA , Odeon | PD 74053 |
| 5.13 | I.O.U. | 3:50 | Freeez | 100 Dance Hits of the Eighties | Various Artists | Album + Compilation | | Connoisseur Collection | DBOX CD 101 |
| 1.1 | I.O.U. | 3:50 | Freeez | I.O.U. / Southern Freeez | Freeez | Singolo | | Old Gold | OG 4169 |
| 1.15 | I.O.U. | 3:52 | Freeez | The Disco Years, Volume 4: Lost in Music | Various Artists | Album + Compilation | | Rhino | R2 70275 |
| 2.4 | I.O.U. | 3:49 | Freeez | Now That’s What I Call Music! 1983 | Various Artists | Album + Compilation | | Box Music , PolyGram, Virgin EMI | 7243 8 27059 2 5, CDNOW 1983 |
| 1.5 | I.O.U. | 3:50 | Freeez | Classic Energy | Various Artists | Album + Compilation | | RPM | CDRPM 1341 |
| 1.8 | I.O.U. | 3:51 | Freeez | The 80's Collection: 1983: Alive and Kicking | Various Artists | Album + Compilation | | Time–Life Music | TL 544/14 |
| 1.18 | I.O.U. | 3:50 | Freeez | The Best of 1980–1990, Volume 12 | Various Artists | Album + Compilation | | EMI Electrola GmbH | 7243 8 53570 2 2 |
| 1.4 | I.O.U. | 3:49 | Freeez | Disco Mania | Various Artists | Album + Compilation | | Crimson | CRIMCD89 |
| 2.12 | I.O.U. | 3:50 | Freeez | Simply the Best Disco | Various Artists | Album + Compilation | | Warner Bros. Records | 95483542826 |
| 2.19 | I.O.U. | 3:49 | Freeez | Fetenkult: Disco 80 | Various Artists | Album + Compilation | | Ariola , BMG | 74321 58776 2 |
| 4.16 | I.O.U. | 3:51 | Freeez | The Disco Box | Various Artists | Album + Compilation | | Rhino | R2 75595 |
| 2.8 | I.O.U. | 3:49 | Freeez | Modern 80’s: The Best of Discopop, Vol. 3 | Various Artists | Album + Compilation | | Polystar | 564 413-2 |
| 1.16 | I.O.U. | 3:49 | Freeez | Now That’s What I Call Music! 1983: The Millennium Series | Various Artists | Album + Compilation | | Universal , Virgin | 7243 5 20262 2 7, NOWMIL 1983 |
| 2.11 | I.O.U. | 3:49 | Freeez | Disco Super Stars | Various Artists | Album + Compilation | | Disky | BX 857952, BX 857962, BX 857972, BX 857982, BX 857992, BX 858002, BX 858012, BX 858022 |
| 1.17 | I.O.U. | 3:49 | Freeez | Millennium Hits 1980-1989: Pop | Various Artists | Album + Compilation | | Disky | BX 856922 |
| 1.5 | I.O.U. | 3:50 | Freeez | Ulli Wengers One Hit Wonder, Volume 1 | Various Artists | Album + Compilation | | Ganser & Hanke Media | 770 110-2 |
| 1.10 | I.O.U. | 3:51 | Freeez | Club Mix Retro: The '80s, Volume 1 | Various Artists | Album + Compilation | | Cold Front | 4431-2 |
| 1.2 | I.O.U. | 3:48 | Freeez | Electro Breakdance: The Real Old School Revival | Various Artists | Album + Compilation | | Telstar TV | TTVCD3240 |
| 2.6 | I.O.U | 3:46 | Freeez | Back to the Old Skool: Hip Hop | Various Artists | Album + Compilation | | Ministry of Sound | MOSCD 32 |
| 2.5 | IOU | 3:49 | Freeez | Electric Dreams: 80's Synth Pop Classics | Various Artists | Album + Compilation | | Virgin TV | VTDCD 447 |
| 2.11 | I.O.U. | 3:49 | Freeez | Disco Super Stars | Various Artists | Album + Compilation | | Disky | CB 792282 |
| 2.11 | I.O.U. | 3:49 | Freeez | Disco Super Stars | Various Artists | Album + Compilation | | Disky | BX 857952, BX 857962, BX 857972, BX 857982, BX 857992, BX 858002, BX 858012, BX 858022, SP 857942 |
| 1.15 | I O U | 3:48 | Freeez | Studio 54 | Various Artists | Album + Compilation | | ARS Productions | 740704-2 |
| 1.13 | I.O.U. | 3:48 | Freeez | The Funkin 80s | Various Artists | Album + Compilation | | Telstar TV | TTVCD3301 |
| 3.18 | I.O.U. | 3:49 | Freeez | Get Down Tonight: The Disco Explosion | Various Artists | Album + Compilation | | Shout! Factory | 30341 |
| 1.53 | I.O.U. | 3:48 | Freeez | 100 Hits of the 80s (MP3) | Various Artists | Album + Compilation | | Disky | MPR 902152 |
| 1.16 | I.O.U. | 3:47 | Freeez | The Best Club Anthems: 80s Classics | Various Artists | Album + Compilation | | EMI , EMI TV | 00946 3 73242 2 6, VTDCD 842 |
| 2.12 | I.O.U. | 3:50 | Freeez | They Sold a Million – Eighties | Various Artists | Album + Compilation | | Disky | BX 904346 |
| 1.18 | I.O.U. | 3:48 | Freeez | 100 mp3 Original Hits 80’s | Various Artists | Album + Compilation | | Disky | MPR 904810 |
| 2.9 | I.O.U. | 3:49 | Freeez | Die Hit-Giganten: One-Hit Wonder | Various Artists | Album + Compilation | | Sony BMG Music Entertainment | 88697170862 |
| 1.18 | I. O. U. | 3:50 | Freeez | 100 Hits Collection 80's | Various Artists | Album + Compilation | | Disky | MP 905974 |
| 1.6 | I.O.U. | 3:50 | Freeez | Gerard Ekdom's BBQ Box | Various Artists | Album + Compilation | | EMI Catalogue Marketing | 50999 6466662 4 |
| 2.4 | I.O.U. | 3:49 | Freeez | 80s Groove | Various Artists | Album + Compilation | | Ministry of Sound | MOSCD230 |
| 3.8 | I.O.U. | 3:49 | Freeez | Anthems: Electronic 80s 2 | Various Artists | Album + Compilation | | Ministry of Sound | MOSCD214 |
| 3.8 | I.O.U. | 3:49 | Freeez | Anthems: Electronic 80s 2 | Various Artists | Album + Compilation | | Ministry of Sound | MOSCD214 |
| 3.12 | I.O.U. | 3:47 | Freeez | Funky Grooves | Various Artists | Album + Compilation | | Universal Music TV | 5333018 |
| 2.3 | I.O.U. | 3:48 | Freeez | Ministry of Sound: Anthems: Electronic 80s | Various Artists | Album + Compilation | | Just Music | CDJUST443 |
| 2.18 | I.O.U. | 3:48 | Freeez | Greatest Ever! 80s Pop Anthems: The Definitive Collection | Various Artists | Album + Compilation | | Union Square Music | GTSTCD080 |
| 3.7 | I.O.U. | 3:48 | Freeez | NOW That’s What I Call 80s Dance | Various Artists | Album + Compilation | | NOW | CDNNNOW4 |
| 2.19 | IOU | 3:48 | Freeez | Deutschland 83: Die Musik aus der TV-Serie | Various Artists | Album + Soundtrack | | Polystar , Universal Music Strategic Marketing | |
| 1.59 | I.O.U. | 3:49 | Freeez | Fetenhits: One Hit Wonder (Best Of) | Various Artists | Album + Compilation | | Polystar | |
| 4.7 | I.O.U. | ?:?? | Freeez | NOW Presents Electronic | Various Artists | Album + Compilation | | Sony Music | LPNBX2 |
| 1.9 | I.O.U. | 3:49 | Freeez | NOW That’s What I Call a Massive 80s Party | Various Artists | Album + Compilation | | EMI , Sony Music | 0196587627126, CDNNNOW134 |
| 1.15 | I.O.U. (7″ version) | 3:48 | Freeez | Freeez Frame! The Best of Freeez | Freeez | Album + Compilation | | | |