One who eats terumah intentionally must repay its value, but not the fifth. And the repayment remains hullin, therefore, if the priest wishes to forgive the repayment, he may.

If the daughter of a priest married an Israelite and afterwards ate terumah, she must repay the value but not the fifth, and her death-penalty [for adultery] is by burning. If she married any of those disqualified [from marrying her], she must pay back both the value and the fifth, and her death-penalty [for adultery] is by strangling, the words of Rabbi Meir. But the sages say: in either case, she repays the value but not the fifth, and the death penalty is by burning.

One who feeds [terumah] to his small children, or to his slaves whether they are of majority age or minors, or one who eats terumah from outside the land, or less than an olive’s bulk of terumah, must repay the value, but not the fifth; and the repayment remains hullin. Therefore, if the priest wishes to forgive the repayment, he may.

This is the general principle: whenever one has to repay both the value and the fifth, the repayment becomes terumah, and if the priest desires to forgive the repayment, he cannot forgive. But whenever one has to repay the value only and not the fifth, the repayment remains hullin (non-sacred produce), and if the priest wishes to forgive the repayment, he can.

If there were two baskets, one of terumah and one of hullin, and a seah of terumah fell into one of them, but it is not known into which, behold I can assume that it had fallen into that of the terumah. [Two baskets] and it is not known which was of terumah and which of hullin, and he eats from one of them, he is exempt, and the second basket is treated as terumah and subject to the laws of hallah, the words of Rabbi Meir. But Rabbi Yose exempts it. If another person eats from the second basket he is exempt. If one man ate of both, he must repay the value of the smaller of the two.

If he used one of these [baskets] as seed, he is exempt, and the second is treated as if it were terumah and subject to the law of hallah, the words of Rabbi Meir. But Rabbi Yose exempts it. If another person uses the second as seed, then he is exempt. If one man uses both as seed, if it is of a kind whose seed disintegrates [in the ground] it is permissible, but if it is of the kind whose seed does not disintegrate it is prohibited.