In general, all persons in- terested in the subject-matter of a suit who cannot be made plaintiffs should be made defendants. They may claim under differ- ent rights if they possess an interest cen- tering in the point in issue; 4 Cow. 682. In order to obtain the rescission of a contract of sale, all of the parties interested in the property involved must be brought before the court; 52 Kan. 227. Bills for discovery need not contain all the parties interested as defendants; 1 M'Cord, Ch. 801; and a person may be joined merely as defendant in such bill; 8 Ala. 214. A person should not be joined as a party to such bill who may be called as a witness on trial; 18 III. 212; 3 Barb. Ch. 482. And see 1 Chandl. 286. Assignor and assignee. An assignor who retains even the slightest interest in the subject-matter must be made a party; 8 Dev. & B. Eq. 395; 1 Green, Ch. 347; 2 Paige 289; 11 Cush. 111; as a covenantee in a suit by a remote assignee; 1 Dana 585; or an assignee in insolvency, who must be made a party; 3 Johns. 543; 1 Johns. Ch. 339; 10 Paige 20; or the original plaintiff in a creditor's bill by the assignee of a judg- ment; 4 B. Monr. 594. A fraudulent assignee need not be joined in a bill by a creditor to obtain satisfaction out of a fund so transferred; 1 Paige 637. The assignee of a judgment must be a party in a suit to stay proceedings; 11 Paige 438. Corporations and associations. A cor- poration charged with a duty should be joined with the trustees it has appointed, in a suit for a breach; 1 Gray 399; 7 Paige 281. Where the legal title is in part of the members of an association, no others need be joined; 1 Gilm. 187. The directors of a corporation may be included as parties de fendant in a bill against the corporation for infringement of a trade-mark; 53 Fed. Rep. 124. When discovery is sought, the officer from whom the information is to be ob- tained should be made a co-defendant with the corporation; 93 Ala. 542. Officers and agents may be made parties merely for purposes of discovery; Beach, Eq. Pr. § 61, n.; 9 Paige 188. Creditors who have repudiated an assign- ment and pursued their remedy at law are properly made parties to a bill brought by the others against the trustee for an ac- count and the enforcement of the trust; 3 Wisc. 367. So, when judgments are im- peached and sought to be set aside for fraud, the plaintiffs therein are indispensa- ble parties to the bill; 20 Ala. 200. To a bill brought against an assignee by a cred- itor claiming the final balance, the pre- ferred creditors need not be made parties; 28 Vt. 465. See, also, 20 How. 94; 1 Md. Ch. 299; 3 Metc. 474; 11 Paige 49. Debtors must in some cases be joined with the executor in a suit by a creditor: though not ordinarily; Story, Eq. Pl. § 227; 1 Johns. Ch. 305. Where there are several debtors, all must be joined; 1 M'Cord, Ch. 301; unless utterly irresponsible; 1 Mich. 446. Judgment debtors must in some cases be joined in suits between the creditor and assignees or mortgagees; 5 Sandf. 271. In an action by judgment creditors for the appointment of a receiver, to take charge of property belonging to their debtor, the payees of unpaid purchase-money notes given for such property are necessary par- ties; 12 So. Rep. (Miss.) 596. Executors and administrators should be made parties to a bill to dissolve a partner- ship; 21 Ga. 6; to a bill against heirs to dis- cover assets; 7 B. Monr. 127; to a bill by creditors to subject lands fraudulently con- veyed by the testator, their debtor, to the satisfaction of their debt: 9 Mo. 304. See, also, 21 Ga. 433; 6 Munf. 520; 7 E. L. & Eq. 54. Foreclosure suits. All persons having an interest, legal or equitable, existing at the commencement of a suit to foreclose mort- gaged premises, must be made parties, or they will not be bound; Tiedm. Eq. Jur. § 441; 4 Johns. Ch. 605; 10 Paige 307; 10 Ala. N. S. 283; 3 Ark. 364; 6 McLean 416; 11 Tex. 526; including the mortgagor with- in a year after the sale of his interest by the sheriff; 4 Johns. Ch. 649; and his heirs and personal representative after his death; 2 Bland 684. But bond-holders for whose ben- efit a mortgage has been made by a corро- ration to a trustee need not be made parties: 5 Gray 162; Jones, Corp. Bonds & Mortg. § 398. A person claiming adversely to mort- gagor and mortgagee cannot be made a de- fendant to such suit; 8 Barb. Ch. 438. Heirs, distributees, and devisees. All the heirs should be made parties to a bill re- specting the real estate of the testator; 8 599. Ν. Υ. 261; 2 Ala. N. s. 571; 4 J. J. Marsh. 231; 5 111. 452; although the testator was one of several mortgagees of the vendee, and the bill be brought to enforce the ven- dor's lien; 6 B. Monr. 74; but need not to & bill affecting personalty; 1 M'Cord, Ch. 280. Where, in a suit to set aside a deed for fraud, one of the heirs did not join as plaintiff, he may be made a party defend- ant, even if he should elect to affirm the deed; 156 Mass. 208. All the devisees are