Each lab has a preferred method of returning the samples to the lab. Instructions for how to return the samples will be provided within each test kit.
Most samples need to be returned to the lab via a courier service, the fee for which is paid to the lab at the same time the test fee is paid (unless a pre-paid postage label is included with your kit). Details of shipping options are provided within the test kit, please follow these instructions carefully.
In the UK, the shipping fee is in addition to the test fee (ranges from around £9 to £12). If you’re shipping your sample from outside the UK, shipping fees will vary.
In the UK, very occasionally a sample may be returned to the lab via the Post Office, using Royal Mail Special Delivery – guaranteed next day delivery. If this is an acceptable method for returning samples, then the test kit instructions will say so.
Most samples require a courier service because the sample type or volume is more than what Royal Mail permits. Please ensure you’re using the appropriate method for returning samples. Optimised accepts no responsibility for samples being lost, arriving at the lab too late or not viable for analysis.