Create a one-page chronology
Begin with the date of the offer, payment, expected performance, discovery of the problem, merchant contact and bank complaint. Link each event to a document. A concise chronology helps the reviewer understand the case before opening a long chain of attachments.
Preserve originals
Keep original emails, invoices, statements and downloaded account records. Screenshots are useful, but they can omit sender details, URLs or timestamps. Where possible, export messages and webpages to a stable format and note when they were captured. Do not edit the source files.
Match evidence to each point
Separate proof of payment from proof of the promise and proof of the breach. For example, a statement may show that money left the account, while the order page shows what was purchased and delivery tracking shows whether it arrived. Label attachments in the same order as the chronology.
Explain gaps honestly
Missing documents do not become stronger through speculation. State what is unavailable, why it is unavailable and whether another record supports the same point. Consistent, accurate information is more useful than an overconfident narrative that conflicts with the bank's records.
Submit securely and keep a copy
Use the bank's approved channel, redact unrelated sensitive information where appropriate and retain the exact package submitted. Record reference numbers and response dates. Requirements vary by payment method and forum; this is general information rather than legal advice.