Use case
Sign a purchase agreement online
Whether you are buying a used car, selling equipment, or closing a private sale, a purchase agreement puts the terms in writing. You can sign one online in minutes, with the document — and the dollar figures in it — kept private on your device.
Updated June 2, 2026
Step by step
- 01
Open the agreement
Upload the purchase or sales agreement PDF to the DocSignHub signer.
- 02
Sign as buyer or seller
Add your signature on the appropriate line and initial any pages or clauses that require it.
- 03
Date and exchange
Add the date, download the signed agreement, and send it to the other party to countersign.
For private sales
Private transactions — a car, furniture, equipment — benefit from a written agreement that records the item, price, condition, and both parties. Signing the PDF in the browser lets both buyer and seller add signatures and keep matching copies without involving a signing service.
Confirm the essentials before signing: an accurate description of the item, the agreed price and payment terms, the condition or "as-is" status, and the date of sale.
Keep the financial terms private
Purchase agreements list prices and sometimes payment details. Because the document is processed locally and never uploaded, those figures are not stored on a third-party server — the signed copy passes directly between buyer and seller.
Frequently asked questions
Can both buyer and seller sign the same agreement?+
Yes. Each party opens the agreement in the signer, adds their signature and date, and passes the updated PDF to the other to countersign.
Is an online purchase agreement legally valid?+
For most goods and private sales, yes — electronic signatures are recognized under laws like the US ESIGN Act. Some high-value transactions such as real estate may carry extra requirements worth confirming locally.