A buyer that orders equipment for delivery months away pays before anything arrives, and a seller that builds to order commits supply before it is paid. Three instruments secure that gap: a performance bond from a surety, a standby letter of credit from a bank, and the buyer's deposit held in escrow. The choice of performance bond vs standby letter of credit comes down to when each one pays: an issuer under Article 5 of the Uniform Commercial Code (UCC) pays a presentation that complies on its face, while under the International Chamber of Commerce (ICC) Uniform Rules for Contract Bonds (URCB 524) a guarantor pays only once a default has occurred [5, 21]. This explainer reads UCC Article 5, the International Standby Practices (ISP98) and the ICC Uniform Rules for Demand Guarantees (URDG 758) as they state them. It is research, never legal or financial advice.
For GPU systems, what sets lead times decides how long that gap runs.
Three instruments and who stands behind each
Standby letter of credit. UCC Article 5 defines a letter of credit as a definite undertaking by an issuer to a beneficiary, made at the request or for the account of an applicant, to honor a documentary presentation by payment or delivery of an item of value [1]. In an equipment sale secured this way, the applicant is the seller and the beneficiary is the buyer. Bank reports call one a performance standby when it pays because a customer fails to perform a non-financial contractual obligation, and a financial standby when it covers a failure to repay a loan or debt [24].
Surety bond. Wex describes a three-party agreement among the principal, who needs the bond, the obligee, who requires it, and the surety, which guarantees the principal's performance [27]. Its own example is a company making a large purchase from a foreign supplier and requiring the supplier to post one [27]. URCB 524 makes the guarantor's liability "accessory to the liability of the Principal" [21].
Escrow. Money or other assets go to a neutral third party, the escrow agent, who holds them until the conditions in an escrow agreement are met and releases them only on the parties' agreed instructions [26].
The words shift by country. A 2020 Norton Rose Fulbright note says English-law practice often calls on-demand instruments bonds or guarantees too, and that standbys began in the United States because U.S. banks "were prohibited from issuing guarantees" [28]. ISP98 and URDG 758 apply when an instrument adopts them by express reference [19, 20]. URDG 758 calls a demand guarantee any signed undertaking that pays on presentation of a complying demand [20].
Performance bond vs standby letter of credit
| Standby letter of credit | Surety performance bond | |
|---|---|---|
| Issued by | A bank or other person, the issuer [1] | A surety [27] |
| Obligation | The issuer's own, independent of the sale contract [2] | Accessory to the seller's, with its contract defenses, under URCB 524 [21] |
| Pays on | A presentation that complies on its face [5] | A default, once established, under URCB 524 [21] |
Independence is the core of the standby. ISP98 makes a standby irrevocable, independent, documentary and binding from issue, whether or not it says so [19]. URDG 758 says guarantors "deal with documents and not with goods, services or performance" [20].
Norton Rose Fulbright wrote in 2020 that the buyer presents a statement, usually "a properly completed draw certificate", that the other party is in default or that the draw conditions are met [28]. URDG 758 asks the beneficiary to state in what respect the applicant is in breach, unless the guarantee excludes it [20].
The clocks are short. A UCC issuer must honor or give notice of discrepancies within a reasonable time, no later than the seventh business day after receiving documents [5]. ISP98 deems notice of dishonor within three business days not unreasonable and beyond seven unreasonable [19]. A URDG 758 guarantor examines a demand within five business days, and one that misses the rejection deadline loses its right to say the demand does not comply [20].
The surety works on the contract. Norton Rose Fulbright wrote in 2020 that its obligation does not mature until the principal defaults, and that a claim goes through an adjustment process in which the surety investigates and may deny it [28]. Under URCB 524 the guarantor may inspect the goods, pays only once a default is established, and keeps every defense the seller has under the contract [21]. The same note says a bond can instead be drafted to pay against a proper notice of default, with waivers of the surety's defenses [28].
What each costs the seller
A standby draws on the seller's bank credit. The Federal Deposit Insurance Corporation (FDIC) calls it a potential extension of credit, to be evaluated like a direct loan, and notes that the account party generally signs an agreement to reimburse the bank [25]. Under federal lending-limit rules for national banks, a commitment to advance funds under a standby is an extension of credit [14]. Under the Federal Reserve's capital rule, a bank calculates the exposure amount of an off-balance sheet item with credit conversion factors: 50% for a performance standby and 100% for a financial standby [15].
One public credit agreement, dated 27 March 2026, charges a letter of credit fee of 1.125% to 1.625% a year on the amount available to draw, set by the borrower's debt-to-capitalization ratio, plus 0.125% a year to the issuing bank, within a $50 million cap inside the borrower's revolving credit [33]. It shows one borrower's terms at one date.
A GPU cloud company's quarterly report for the period to 30 June 2026 describes a data-center lease, signed in May 2026, that required an irrevocable standby of about $12.96 million, sized at six months of the initial annual base rent and drawable on certain events of default [34]. That standby secures a capacity lease.
Norton Rose Fulbright's 2020 note says surety bonds stay off the corporate balance sheet, leave the credit line untouched, and are generally cheaper and may not need collateral [28].
The buyer's deposit in escrow
The deposit is the buyer's own exposure while it waits. A buyer that has paid part of the price can recover identified goods on the seller's insolvency only if the seller becomes insolvent within ten days after receiving the first installment [10]. The Bankruptcy Code's priority for deposits covers individuals buying for personal, family or household use, up to $3,800 from 1 April 2025, so a business buyer's equipment deposit falls outside it [18].
Escrowed cash still sits in a bank. Funds deposited in an agent's name are insured as if deposited in the principal's name, and the standard maximum is $250,000 [16, 17]. On a hypothetical $10 million deposit held for one buyer at one bank, no more than 2.5% is insured (computed here from [16, 17]).
If the buyer breaches and the seller justifiably withholds delivery, the buyer can recover what it paid above 20% of its total obligation or $500, whichever is smaller, where the contract fixes no liquidated damages, subject to offsets [9]. What buyers can do when GPU systems arrive late covers the reverse case.
What can stop a demand
Strict compliance cuts both ways. An issuer must honor a presentation that appears on its face strictly to comply with the credit's terms, and must dishonor one that does not [5]. Conditions with no document attached are disregarded under the UCC [5], ISP98 [19] and URDG 758 [20]. On these rules, a standby payable if the seller fails to deliver, naming no document, pays on the demand alone.
Fraud is the narrow exception. Under UCC 5-109, a court may enjoin honor only if, among other findings, the applicant is more likely than not to succeed on its claim of forgery or material fraud [6]. In a 2002 letter of credit case, the Supreme Court of Ohio held that material fraud is fraud that "has so vitiated the entire transaction" that the purposes of independence can no longer be served [31]. ISP98 leaves fraud defenses to applicable law [19], and URDG 758's articles contain no fraud rule [20].
Checking the issuer, the surety and the expiry date
A buyer can ask a bank it knows to confirm the standby. A confirmer is directly obligated on the letter of credit, with an issuer's rights and obligations to the extent of its confirmation [4]. One public check on a surety is the Treasury's Circular 570 list of certified companies, whose original listing was published on 1 August 2026 and is updated with supplemental changes. It gives each company's underwriting limit and the states where it holds surety licenses [30].
A U.S. letter of credit with no stated expiry lapses one year after issue [3]. A URDG 758 guarantee with no expiry date or event ends after three years [20]. URCB 524 sets a bond's default expiry at six months after the latest date for performance [21]. An instrument that ends before the latest delivery month leaves later deliveries without security.
In Rillor's forward purchase agreements for GPU systems, the buyer pays a deposit at signing to an independent escrow agent, which holds it and releases it as the agreement sets out, and the seller posts a performance bond. Forward agreements for GPU systems sets out the grade, delivery month and power terms around this kind of structure.
Read the full report
The full report compares the rule sets on deadlines, fraud and expiry, and lists all 35 sources.