Old gold purchase receipt

Turn weighed items into a purchase receipt. The server calculates fine gold from weight and fineness and the payout from the daily price entered by the business. No prices are fetched.

Input

Result

A table of items with weight, fineness, fine gold and payout, the totals, a fixed notice, a short text and signature lines for buyer and seller.

A purchase receipt for old gold has to add up item by item. This tool multiplies the weight of each item by its fineness, rounds the fine gold to a milligram and multiplies by the price per gram of fine gold and the share paid, both entered by the business. It fetches no prices and tests no authenticity. Unusual fineness values are listed for a second look. Signature lines for buyer and seller are added.

Your texts, pages and images are processed on our own servers in the EU. Trust Center

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Who it is for

Goldsmiths, jewellers and shops that buy old gold.

Typical uses

Write a receipt at the counter.
Show the seller how the payout is made up.
Check a batch of items before melting.

Example

Input

Buyer: Berg Goldsmiths, Market Square 4 Seller: Anna Novak Date: 14 May 2026 Receipt number: AK-0193 Items bought: id,item,weight_g,fineness,note A1,Ring,4.2,585, A2,Chain,12.75,750, A3,Earrings,0.875,333,weighed without stones A4,Bracelet,,585,clasp still to be removed Price per gram of fine gold: 58.40 Share paid (%): 90 Currency: EUR Notes: Hallmarks checked with a loupe, chain tested with acid on the clasp.

Result

A table of items with weight, fineness, fine gold and payout, the totals, a fixed notice, a short text and signature lines for buyer and seller.

A fixed example, shortened. Real results are AI-generated: please check them.

Price and limits

Price: usually 1–3 credits
Available with: Free, With package
Input limit: One page with up to 20,000 characters of HTML

Privacy

Processed on our own servers in the EU (Poland). Inputs and results are deleted after 7 days (Free) or 30 days (packages), or right after you see the result if you choose not to store them. Images are deleted right after processing.

In the API

Tool name: gold_purchase_receipt. Create a job with POST /api/v1/jobs and fetch the result with GET /api/v1/jobs/{id}. You find your API key in your account.

curl -X POST https://do4u.eu/api/v1/jobs \
  -H "Authorization: Bearer d4u_…" -H "Content-Type: application/json" \
  -d '{"tool": "gold_purchase_receipt", "url": "https://example.com/"}'

Full API documentation →

Questions and answers

Who does the calculation?

The server calculates all sums from the table. The AI only writes the text and cannot change the figures.

Where does the gold price come from?

Only from the input. The tool fetches no prices, and the AI does not see the price or any amount.

Does the tool check authenticity or legal duties?

No. Weight and fineness are used as entered. Identification, record keeping and tax stay with the business.

Is my text stored?

Only as long as needed: 7 days on Free, 30 days with a package – or not at all if you choose not to store it. Processing happens on our own servers in the EU (Poland).

Can I use the result right away?

Results are AI-generated. Please read them before you publish or send them.