Talmud for Moed Katan 3:3
וְאֵלּוּ כּוֹתְבִין בַּמּוֹעֵד, קִדּוּשֵׁי נָשִׁים, גִּטִּין וְשׁוֹבָרִין, דְּיָתֵיקֵי, מַתָּנָה וּפְרוֹזְבּוּלִין, אִגְּרוֹת שׁוּם וְאִגְּרוֹת מָזוֹן, שִׁטְרֵי חֲלִיצָה וּמֵאוּנִים, וְשִׁטְרֵי בֵרוּרִין, וּגְזֵרוֹת בֵּית דִּין, וְאִגְּרוֹת שֶׁל רָשׁוּת:
And these may be written on Chol Hamoed: Betrothals of women [He writes on paper or on a shard: "You are betrothed to me," and she is betrothed even though it is not worth a p'rutah. This may be done on Chol Hamoed lest another come first and betroth her, so that she is "davar ha'aved" ("something which might go lost")], writs of divorce (gittin) [as when he wishes to leave with a caravan, and if he does not write a get now, she will remain an agunah (unmarried)], receipts [For if the debtor refuses to pay without a receipt, he is heeded and he can go (without paying), so that the creditor might lose his money.], diatiki [the gift of one who is dying. "diatiki," acronymic for "da tehei lemeikam velihyoth" ("This shall stand for confirmation.") For the words of a dying man (shechiv mera) are as written and relegated.], a gift [of a healthy man. If it is not written down, the beneficiary might lose out, for the giver might retract.], prozbolin, [that shevi'ith (the sabbatical year) not cancel the loan and he (the creditor) lose his money. "prozbol," acronymic for "proz buli uproz buti," "an amendment for the rich and an amendment for the poor." For the rich — that they not transgress (Deuteronomy 15:9): "Take heed unto yourself lest there be in your heart a thing of wickedness, etc." for the poor — that they find what to borrow. ("buli" = rich; "buti" = poor). Hillel instituted the prozbol, a writ in which the creditor states: "I relegate to you, so and so, the judges, (all monies owing me) so that I can collect any writ outstanding with so and so, whenever I wish" — whereby shevi'ith no longer releases it, it being considered as if beth-din collects his debt so that it no longer comes under (Ibid. 2): "He shall not exact it of his neighbor."], writs of assessment, [beth-din assessing the property of the debtor and giving it (the writ) to the creditor], writs of sustenance, [beth-din selling land for the sustenance of one's wife and daughters, this being recorded as an act of beth-din. Or, (a writ indicating) that one has taken it upon himself to feed his wife's daughter (by a previous marriage)], refusals [A minor who was betrothed by her mother and brothers can "refuse" her husband, saying: "I don't want this man as a husband," whereupon she leaves him without a divorce. The writ attesting to this is called a "writ of refusal" (miun)], writs of selection [of judges; each of them selecting a judge for himself and writing that they will not contest the decision of the judges], decrees [i.e., rulings] of beth-din, and writs of rashuth [edicts of the authorities, as in "Ve'al tithvada larashuth" ("Do not impose yourself upon the ruling powers."), "Hevu zehirim barashuth" ("Be heedful of the ruling powers.") Some understand it as ("letters of reshuth"), letters of greeting written by a man to his friend.]