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Fleckner, Andreas Martin, in: Jansen, Nils/Zimmermann, Reinhard (eds.), Commentaries on European Contract Laws, 2018, at 1756 et seq.

Fleckner, Andreas Martin, in: Jansen, Nils/Zimmermann, Reinhard (eds.), Commentaries on European Contract Laws, 2018, at 1756 et seq.
Table of Contents

Introduction before Art 13:101


VII. Outlook

26 [...] Asking for the ratio of regulating set-off becomes even more urgent if one includes the experiences and statements elsewhere, because the ratio or rationes given for the set-off regimes differ. As indicated at the outset of this Introduction, for Severus Alexander it is nothing less than aequitas that justifies set-off,188 a term also used by Gaius189 and Papinian.190 Very similar is the notion that it would be unjust to demand something that has to be returned immedi-
ately,191 or more generally, that set-off is based on good faith,192 fairness,193 fair dealing,194 or natural justice.195 The second group of rationales often heard to justify set-off rules may be referred to as considerations of efficiency;196 set-off is believed to reduce the number of unnecessary lawsuits,197 avoid circuity of action,198 and prevent multiplicity of suits.199 While making lawsuits more efficient is certainly in the public interest, because it helps concentrate the scarce resources of the judicial system on those cases that cannot be settled otherwise; it is also - as properly observed by Pomponius almost two millennia ago - in the parties' own interest.200 Discussing these and similar reasons for enacting set-off rules is not a philosophical exercise for those mulling over set-off rules in the ivory tower. Instead, it is the very question that has to be answered prior to any revision of the model rules, because the rationale for enacting set-off rules directly determines the proper scope of the rules: if the rules are based on the notion of aequitas, good faith, etc., then it suffices to allow defendants to raise set-off as a defence; if the rules are (also) based on the notion of efficiency, then set-off will have to go beyond a mere defence, and the scope of the rules will be much broader.201


Art 13:101: Requirements for Set-off


VIII. Conclusion

32 Requirements of set-off. For those entrusted with the formulation o'r set-off rules, the requirements of set-off appear to be uncontroversial. The drafter of the GermanAufrechnung provisions noted that there was little dispute about the prerequisites of set-off,124 and the PECL reporter maintained that it 'follows from the nature of things' that 'the requirements for set-off are largely identical (mutuality, obligations of the same kind, the cross-claim must be due, the party declaring set-off must be entitled to perform)'.125 Those statements have to be taken with a grain of salt, though. Claiming chat the proposed rules reflect a general consensus belongs to the basics of statutory drafting, and the set-off provisions under investigation here are no exception. Aside from the principle of reciprocity, which is the formative element of set-off, all requirements discussed in the previous sections have turned out to be controversial over time and across jurisdictions (including the various exceptions from the principle of reciprocity). And this is still just the surface. A more detailed examination of the: sources provided above would reveal many additional differences.126 Even the model rules, ie, regimes that are supposed to
identify common principles, are not homogeneous. They are split on whether liquidity (along with connexity) should form a substantive prerequisite of set-off or not; in addition the requirements that the cross-claim be enforceable and that the principal claim be fulfillable differ in several respects. Is there anything else to add to the list of prerequisites? The DCFR also requires that 'each party has authority to dispose of that party's right for the purpose of the set-off, to exclude situations where third parties, especially creditors, have acquired rights with respea to the claims.127 In the PECL and the PICC, this is implicitly assumed,128 and it is indeed difficult to see how the DCFR adds anything but the obvious.129 Overall, therefore, it appeares that the requirements mentioned in the three model rules are those that are decisive. Users should only be reminded that the requirements themselves, and many details, differ from jurisdiction to jurisdiction - and to some extent even among the three model rules.

188C 4.31.5 (Severus Alexander, AD 229) ('etiam si fideicommissum tibi ex eius bonis deberi constat, cui debuisse te minorem quantitatein dicis, aequitas compensationis wurarum excludit computationem, petitio auterri eius, quod amplius tibi deberi probaveris, sola relinquitur'); C 4.31.6 (Severus Alexander, AD 229) ('neque scriptura, qua caucum est accepta quae negas tradita, obligare te contra fidem veritatis potuit et compensationis aequitatem iure postulas. non enim prius exsolvi, quod debere te constiterit, aequum est, quam petitioni mutuae responsum fuerit, eo magis, …'); C 5.21.1 pr (Severus Alexander, AD 229) ('compensationis aequitatem iure postulas. non enim prius exsolvi quod debere te consciterit aequum est, quam petitioni mutuae responsum fuerit, eo magis, …').
189Gai D 16.2.5 ('si quid a fideiussore petetur, aequissimum est eligere fideiussorem, quod ipsi an quod reo debecur, compensare malic: sed et si utrumque velit co.mpensare; audiendus est').
190Pap D 16.2.18 pr ('in rem suam procurator datus post litis contestationem, si vice mutua convematur, aequitate compensationis utetur'); Pap D 26.7.36 ('aequitas, quae merum ius compensationis ind_ucit'); Pap D 34.9.15. ('...sed Falcidiae beneficia non utetur, si tantum in amissis portionibus erit, quod Falcidiam aequitate compensauoms recusaret').
191Generally Paul D 44.4.8 pr = Paul D ('dolo facit, qui petit quod redditurus est'), referred to by Zimmermann, Comparative Foundations, 29 (it should be noted, though, that the expression 'dolo petit', quoted ibid and in fn 53 by Zimmermann, is used neither by Paulus nor by anyone dse in the Digest); also Windscheid, Pandektenrecht, § 349.2 and 349.6 fn 19 and FPF von Kübel, 'Aufrechnung' (1882), in W Schubert (ed), Die Vorlagen der Redaktoren für die erste Kommission zur Ausarbtitung des Entwurfs eines Bürgerlichen Gesetzbuches: Recht der Schuldverhältnisse, vol I (1980) 1073--96, 1084.
192Zimmermann, Comparative Foundations, 29, 35; MaxEuP/Zimmermann, 'Set-Off, 1554.
193Zimmermann, Comparative Foundations, 29; MaxEuP/Zimmermann, 'Set-Off, 1554.
194MaxEuP/Zimmermann, 'Set-Off, 1554.
195Zimmermann, Comparative Foundations, 29; MaxEuP/Zimmermann, 'Set-Off, 1554; similarly Loyd (fn 44) 562.
196Explicitly DCFR Princ. 55 ("The: rules on set-off can be seen as based on the principle of efficiency. There is no reason for X to pay Y and then for Y to pay X, if the cross-payments can simply be set off against each other') (no such principle in DCFRincerim); also PICC 8.1, Comment 1 ('Set-off avoids the need for each party to perform its obligation separately'). Practical considerations arc: also cited, eg, byvon Kiibd (fn 191) 1075; Zimmermann, Obligations, 760; id, Comparativ~ Foundations, 35; MaxEuP/Zimmermann, 'Set-Off' ,1554; Gullifer (fu 52) 284 fn 2; Malinvaud, Fenouillet, and Mekki (fn 56) 694.
197Loyd (fn 44) 562.
198Jeffi v Wood (1723) 2 P Wms 128, 129 (24 ER 668, 669) ('It is true:, stoppage is no payment at law, nor is it, of itself, a payment in equity, but then a very slender agreement for discounting or allowing the one debt out of the other, will make it a payment, because this prevents circuity of action and multiplicity of suits, which is not favoured in law, much less in equity'); Percewall Hutchinson v William Sturges (1741) Willes Common Plea Reports 261, 262 (125 ER 1163, 1163) ("The true reason is that this was only substituted in the room of an action, to prevent circuity or a bill in equity'); also von Kübel (fn 191) 1075, 1084; Loyd (fn 44) 541; Zimmermann,! Comparative Foundations, 27, 35 (the reference to Hutchinson v Sturges should be replaced with Jeffs v Wood); Derham, Set-Off, 12 (ditto); MaxEuP/Zimmermann, 'Set-Off', 1554 (ditto); Gullifer (fn 52) 283, 284,289, 305.
199Jeffs v Wood (1723) 2 P Wms 128, 129 (24 ER 668, 669) (reproduced in fn 198); Zimmermann, Comparative Foundations, 27, 35 (the reference to Hutchinson v Sturges should be replaced with]effi v Wood); Derham, Set-Off,12 (ditto); MaxEuP/Zimmermann, 'Set-Off, 1554 (ditto; the: quote is taken from Jeffs v Wood rather than Hutchinson v Sturges).
200Pomp D 16.2.3 ('ideo compensatio necessaria est, quia interest nostra potius non solvere quam solutum repetere').
201Very aptly observed by Loyd (fn 44) 562 ('Two distinct motives [se for set-off rules] may be detected; one based on the idea that an injustice is done: the defendant in refusing him this privilege, the other that unnecessary lawsuits are a nuisance. The predominance of the latter notion leads to enactments favonng affirmative relief for the defendant; the predominance of the: former to purely defensive statutes').
124von Kübel (fn 102) 1084 ('Ueber die Voraussetzungen der Kompensation herrscht im Ganzen wenig Streit').
125Zimmermann, 'UNIDROIT Principles', 21; similarly id, Comparative Foundations, .44; id, 'Ius Commune', 13; MaxEuP/Zjmmermann, 'Set-Off, 1555
126This is most obvious from the respective sections in the principal set-off accounts, such as those of Wood, Set-Off, Gernhuber (fn 23), or Terré, Simler, and Lequette, Obligations.
127DCFROutline lntr 29 ('The Article on the requirements for set-off (III.-6:102) has been redrafted afi:er it was drawn to our attention that there was a difference in substance between the English and French texts in the PECL. and it has been expanded to make it dear that the rights being set off against each other must both be available for that purpose, and not for example frozen on the application of an arresting creditor'), further explamed 10 DCFR III.-6:102, Comment A.
128PECL 13:101, Comment B ( 4) ('Set-off is also excluded if the debtor may no longer perform because e principal claim has become subject to an order of attachment'); PICC 8.1, Comment 2 (reproduced in fn 27).
129The rule is more sympathetically discussed by Lnb/e and Lehmann/Looschelders and Makowsky, 'Set-Off', 694 f and by Storme (fn 76) 205-7.

Referring Principles
Trans-Lex Principle: III.1 - Set-off
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