Receipt of check prima facie proof of payment, sec 953. Negotiable security may be taken as mere collateral, sec 954. Question one of inference, sec 955.

Acceptance of immature negotiable paper on account operates as conditional payment, sec 956.

Negotiable paper may be accepted in satisfaction, sec 957.

May bar suit when holder by negligence releases paper, sec 958.

If passed to others, or lost or altered, this may bar suit, sec 959.

Void security no payment, sec 960.

VI. Payment in Bank Notes. Valid when a legal tender, sec 961.

VII. Payment by Letter.

Sufficient when in accordance with instructions, sec 962.

VIII. Payment in Goods, and Set-off.

Payment in goods may, by agreement, be equivalent to payment in money, sec 963. Set-off, when agreed to, equivalent to payment, sec 964. Debts excluded by statute, and illegal debts, sec 965.

IX. Effect of Payment.

Damages for detention of debt limited to interest, sec 966. After suit brought, payment must cover interest and costs, sec 967.