Sign an Invoice Online Free

Yes. An electronically signed invoice is legally valid under the ESIGN Act (US), eIDAS (EU), and Australia's Electronic Transactions Act 1999. A signed invoice with a full audit trail — signer name, IP address, timestamp, and document hash — is accepted by clients, accountants, and courts as a binding commercial document.

Not always — many invoices are valid without a signature. However, some clients require a signed invoice for payment authorization, especially for large amounts, government contracts, or regulated industries. Some freelancers and consultants also sign invoices as a professional practice to confirm the work and amount are agreed upon.

Yes. SignBolt's Business plan includes bulk signing, which lets you upload and sign multiple invoices in a single session. For freelancers and small businesses processing several invoices per month, the Pro plan ($8/month) supports up to 50 documents per month.

Yes. Use SignBolt's send-for-signature feature to email the invoice directly to your client. They receive a link, open the invoice in their browser, and add their approval signature — no account or software needed on their end. Both parties receive the signed PDF automatically.

SignBolt's free plan covers 3 invoices per month at no cost — no credit card required. The Pro plan at $8/month supports up to 50 documents per month. The Business plan at $24/month provides unlimited documents, bulk signing, and custom branding. Compare that to DocuSign's cheapest plan at $15/month for only 5 envelopes — SignBolt is significantly more cost-effective for invoice volume.